Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b47a46e9a696d83…

MALICIOUS

PDF

76.0 KB Created: 2021-06-10 03:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3249dedcb505650408a5061132e7d734 SHA-1: 469b1ae94050e974147c9547ba63d94c7c9db872 SHA-256: 8b47a46e9a696d837965f8cd5f842f01722baaf6560f7454fb7e68be066203c9
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or link farm attack, as indicated by the numerous external links and the ML classifier's high confidence score. The document body, though heavily obfuscated, appears to be a lure for downloading a 'Manorama year book 2019 pdf free download', likely leading to malicious content. The presence of multiple external URLs suggests an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/pbw?utm_term=manorama+year+book+2019+pdf+free+download
    • https://static.s123-cdn-static-d.com/uploads/4376606/normal_60b38efaafb3e.pdf
    • https://mawobomogagot.weebly.com/uploads/1/3/4/1/134109187/fffa07896155fe.pdf
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/falezidabun.pdf
    • https://cdn-cms.f-static.net/uploads/4497078/normal_5fd846561be01.pdf
    • https://cdn-cms.f-static.net/uploads/4417429/normal_60563be5eae70.pdf
    • https://bawusazatodopam.weebly.com/uploads/1/3/1/3/131378774/8648515.pdf
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fe7cbe168e77.pdf
    • https://static.s123-cdn-static-d.com/uploads/4392472/normal_60b3a5c5cbfe0.pdf
    • https://cdn-cms.f-static.net/uploads/4477167/normal_6050f01348673.pdf
    • https://static.s123-cdn-static.com/uploads/4466689/normal_5fcc5d3b483d6.pdf
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fe63413e82a2.pdf
    • https://static.s123-cdn-static.com/uploads/4473971/normal_5ff12e3d7bad1.pdf
    • https://cdn-cms.f-static.net/uploads/4417205/normal_6069d606024e7.pdf
    • https://vigodozoxofi.weebly.com/uploads/1/3/4/5/134599787/palimebipinim.pdf
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5fd72e52c5b70.pdf
    • https://static.s123-cdn-static.com/uploads/4444852/normal_5ffe4d43efa9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/349f93d7-62d1-4533-9f42-cf3eb5dcff23/dokotamo.pdf
    • https://uploads.strikinglycdn.com/files/1b07c277-b8e1-45c1-921c-76c4e2b0b7c1/mind_diet_menu_planner.pdf
    • https://uploads.strikinglycdn.com/files/9a13df15-45a5-4816-a467-77133af329bb/91436229127.pdf
    • https://uploads.strikinglycdn.com/files/56b0cfe4-62fa-4441-a103-750104edef96/minecraft_java_apk_download_v1.15.4.2_free.pdf
    • https://uploads.strikinglycdn.com/files/f85d77be-2fc7-49ed-b940-1e7d4e6cab46/bewudop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb38.bin
d3d81584e730f43492ba446fcdc596c57221f149d8fe9a97f4e1ca4ba7c5faa8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB38 5892 bytes
font_01_sfnt_off0000ff5a.bin
dbfea782becc4ac091f62fa9ac81a68d63d240f88d51c1b5ac310d57498e3e59
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 10360 bytes