Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b5df9a33a84644…

MALICIOUS

PDF

75.9 KB Created: 2020-11-19 10:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 112c93cae2fb08e1397ca0fd7ba5bfee SHA-1: f5af7fe7d44b149d485ba920f7b280a3ea8e3494 SHA-256: b0b5df9a33a8464478dceae3ed44abb317fb44f44166f5d929eed15e9ee7749f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or trojan delivery. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/wb?keyword=5%20point%20likert%20scale%20pdf PDF link annotation
    • https://sotokogel.weebly.com/uploads/1/3/4/2/134266154/wopevuzulutezi.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/ef825c0.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/sojako-wiveworaxop.pdfIn PDF document text
    • https://pojetepanale.weebly.com/uploads/1/3/4/3/134361345/ratedid-maveva.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/3109600.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/d3912.pdfIn PDF document text
    • https://fologonalufofu.weebly.com/uploads/1/3/4/6/134694067/fufizuriderixab.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
    • https://s3.amazonaws.com/pazifetanegapu/4809849379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/828a6d15-d92e-4f47-ae72-a30f6400a79d/stormbreaker_replica_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/district_118_wauconda_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ac2789-7d16-42dd-b7a8-74401c7caf92/44902371486.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/64637827509.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/the_giver_jobs_and_page_numbers.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 5028 bytes
SHA-256: 91d501029cc78af1f640a9c02e44b952b30a9fe83e927f7cdca8bfc1f8430ace
font_01_sfnt_off0000eef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF2 11560 bytes
SHA-256: 2afa2994d46f9720915e10679cf938b61ff2b0c4c05e8d018f0cfe8bfe27e0fc
font_02_sfnt_off00011517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11517 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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