Malicious PDF — malware analysis report

Static analysis result for SHA-256 de27f12f27881386…

MALICIOUS

PDF

90.9 KB Created: 2021-09-10 23:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c020a2ed9723e896cbda5ba90c347ac2 SHA-1: e4a933a3e8b99fb6ec286c1f0167115918656c16 SHA-256: de27f12f27881386bfa421d7b2f5a8eb6b9e97bba25e73185410205cf8e7c133
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the heuristics strongly suggest a malicious intent to redirect users through a network of links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trouver-une-ssii.com/img/pics/files/kixenaxixeginirutowe.pdf In PDF document text
    • http://problemconsulting.com/img/download/files/mepikisixedogifodudino.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/82141503282.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163113553490.pdfIn PDF document text
    • http://omni-links.com/images/blog/file/bamizokut.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/42123037800.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/duruvuzumaburixaparape.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335fc48dada---wabonet.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/mafobetuforakusesiti.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/85674821937.pdfIn PDF document text
    • http://canadianrockies.info/files/file/kitizepobevutatatejax.pdfIn PDF document text
    • https://rotitelor.com/contents/files/21850753399.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/fomuvesunebixigikudis.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/66695226761.pdfIn PDF document text
    • https://bselink.com/userfiles/file/pelagakuvakakepedikizirin.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/58995467634.pdfIn PDF document text
    • http://myarrahnu.com/mo_images/files/dotodezereba.pdfIn PDF document text
    • http://8njl.com/userfiles/files/48555720366.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9150967733.pdfIn PDF document text
    • http://industra.sk/userfiles/file/36196244651.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16137a5ad32df8---41962722090.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/febujujul.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/56987724074.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/7875764224.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210911_02653F17D97A7895.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/89d4f2adb55a5415cccb639d928acb9a/61716604785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=rick+and+morty+season+5+123PDF 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://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_off0000fde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F7 11216 bytes
SHA-256: 51e48ba0f625ebfc2846be03dcaf4459d0fb4efe9bdd3fa3fd2f8b0a74974e98
font_02_sfnt_off0001306d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306D 18620 bytes
SHA-256: 084402f8fde55e6a9cad4781fde1771adabcf364f362b55b0be04224360a87fd

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