Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3be96642f219dee…

MALICIOUS

PDF

73.3 KB Created: 2021-09-28 19:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4f5f5c317d3486fb397a38f1b4c9f432 SHA-1: bc5c99ef75de67243ae10e4ed2cd6a0e44949074 SHA-256: b3be96642f219dee8ef4ce9c4796561a62fc90ff798d794062b080a68f048e0e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues about its intent beyond what the heuristics indicate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://southerncross-ex.com/images/blog/file/tiwixituwajevuwamotinuda.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354fc6a585f---12331390954.pdfIn PDF document text
    • http://newo.ru/files/files/bowebonemiwisowiroban.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/fazixapufuxo.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/wimalimubulakeninagej.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/perawetixige.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/77844555532.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca66d386dd---95418253120.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/87894849545.pdfIn PDF document text
    • https://telorgabus.com/contents/files/8939491674.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465afa02838---5212480256.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202109241422395559.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/41557203837.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/62720629576.pdfIn PDF document text
    • http://pasaru.com/upload/files/ruwibofewib.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161464d6ba7a12---37062947313.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/juzeluzuvo.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161350fd5a010d---jejevonovanov.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/17439075616.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161460a6a505ff---tefebezemoxozud.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/dilotogopukusafijov.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5f228f191---kijelojaxoxetawuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=mulan+the+movie+streamingPDF 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_off0000b7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A7 10712 bytes
SHA-256: d87174288e6e7863a6aeaba02a42ee91b0a4cdb21749e0ad78d82a8040fe43a6
font_01_sfnt_off0000d013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD013 18520 bytes
SHA-256: 56538c75af91d2bdf9d6d5458fa3d29f931b36a3261365e09ec1c85b893ccc25
font_02_sfnt_off00010052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10052 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.