Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8c531f3ac8dbd6…

MALICIOUS

PDF

84.1 KB Created: 2021-03-01 14:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5a2b103f7dc2db52f17151c4c8d7128e SHA-1: 01474d6ed8414d847fc6faaa852e7f2a49b52b1d SHA-256: 5a8c531f3ac8dbd678a122fbae5d69ea4ef95e234e4d50611ccd6c84d91db56a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics as malicious, including a critical finding for a PDF link farm. It contains numerous external URLs, with one prominent URL pointing to a suspicious domain. The presence of embedded URLs and the ML classifier's high confidence score indicate a deliberate attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/123?utm_term=al+huda+online+quran+academy PDF link annotation
    • https://veworokog.weebly.com/uploads/1/3/1/6/131606039/wifimetawirevobuteji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465390/normal_5ff142f724719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497646/normal_6028e83e913b4.pdfIn PDF document text
    • https://cdn.sqhk.co/xalisufa/bja6ifX/75771919795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_6008372e6fe9e.pdfIn PDF document text
    • http://mogoxopedutisaw.iblogger.org/ashabul_furud.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/FgeBhcC/pifajezevovakanevosiraz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_6023076d55b55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496404/normal_5ffd9dbeb688f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366405/normal_5ffa85d4bb0d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443624/normal_5fd8e6b968876.pdfIn PDF document text
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/pubomixesijul.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/idhegdT/courier_services_near_me_contact_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_5feb7e73ebd6f.pdfIn PDF document text
    • https://xufujume.weebly.com/uploads/1/3/4/8/134851049/todatenezojemeg-gilam-joramu-kojam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tunozesanapi.rf.gd/72560404813.pdfIn PDF document text
    • http://posufimiru.rf.gd/56447168650.pdfIn PDF document text
    • http://jutesokom.rf.gd/story_of_abraham_and_sarah_bible_gateway.pdfIn PDF document text
    • 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010faf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10FAF 21644 bytes
SHA-256: 55cc91d1c82be597cf5d0327e20bbcdd45e560f8dee38de03fadc945b366d9c1
font_00_sfnt_off0000dab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB0 5020 bytes
SHA-256: 053cafa8a7a08ada56ef1ba2e0167222e5f18a5cdcf507fa22b53ba03fa57b47
font_01_sfnt_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 10564 bytes
SHA-256: 28c888903d245ca4de7a0bca47d687db9c5402b3bebeb93b8d1fe4195ad7c47a
font_03_sfnt_off0001344d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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