Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbb578554874f01…

MALICIOUS

PDF

73.8 KB Created: 2021-09-03 17:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e4403e1c5b53ea4f0dbf58b95d78c432 SHA-1: 8c528d5b0e92881fe9ab339f7ddd61ede64817ce SHA-256: 6cbb578554874f01f4a6d74cb8d19b2edc9685d671fb1019f5c477eb37c2e0f0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal that the document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute further malware. While no scripts were directly extracted, the presence of numerous URLs, including one pointing to a raw IP address, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105dbe1866d5---tolusefivovafowupubor.pdf In PDF document text
    • https://bandotrading.com/uploads/file/zigopafasun.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/54841491868.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lalosigutedupowaba.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/pejoxune.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b86819b11---79345382387.pdfPDF link annotation
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607416148f975---34269933443.pdfIn PDF document text
    • http://geonatlife.es//ckfinder/userfiles/files/60999006351.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/nuzajosujoranemum.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/498f34483fbb4b86bc492a02b0928fbb/51747160118.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/wivapa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f10c58328c---74364224680.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/mu1elrj8m71dc4tljfba7klaf4/70243275669.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/kedilaniwidedenu.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/3685309323.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/92c38de1c45b464adc7ef40e8a1435c8/36440256872.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791d122e80c---vukazujuzirele.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7386be029---goxamepij.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/5136d661e89fd31d5933aeeeb0388ad8/zuwiv.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/74722161184.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/kelinifemod.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/134219081.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/73250149473.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160824c3c25e6b---36027007831.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/punaxosiluwe.pdfIn PDF document text
    • http://uniquestatues.com/clients/9/91/91c6e204ee4529d3b478b0717040545d/File/gapegixedoxiwude.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210718114634.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=vade+mecum+kine+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE17 10412 bytes
SHA-256: 00ce62e4e22029554b335a7494a2a920b1b279a990941972c192fa3a624c1f6a
font_01_sfnt_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 17196 bytes
SHA-256: de8476a0d353a21650625db091c7353095bb36c58726468533f4ee84e200a60e
font_02_sfnt_off000101a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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