Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d49ca6c9cb06b1…

MALICIOUS

PDF

76.2 KB Created: 2021-03-03 10:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8d624fbfc8519a664179b0eb382cb70 SHA-1: b735b957d4c8d44d127e809b995feeb75d3a2ad1 SHA-256: 00d49ca6c9cb06b13b2e162eb78186707af3d17a8bd1c332ab042f6eabac69af
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable or suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=the+art+of+language+invention+ebook
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/9d0bc5724d0c.pdf
    • https://cdn.sqhk.co/kugorazig/0jfRjjV/sports_trading_cards_worth.pdf
    • https://fakadaro.weebly.com/uploads/1/3/5/9/135961508/logowes.pdf
    • http://shop-onlinediscount.xyz/75075121722vtg7k.pdf
    • https://wozagasogudizi.weebly.com/uploads/1/3/2/6/132682295/9d20f8d133ff.pdf
    • https://cdn.sqhk.co/wolebiduju/eYbjh8N/sivaji_the_boss_punch_dialogues_mp3_free_download.pdf
    • https://vikisoxez.weebly.com/uploads/1/3/4/7/134712259/b3183b9.pdf
    • http://pezisafepogux.22web.org/39672753485.pdf
    • https://wetebofi.weebly.com/uploads/1/3/1/6/131608016/30341c06744a72.pdf
    • http://zodoworusa.22web.org/lejowovufakozoxonu.pdf
    • https://cdn.sqhk.co/kinemefuwa/jctgdih/16396301799.pdf
    • https://cdn.sqhk.co/pigexebobe/hjahejh/venmo_card_balance_phone_number.pdf
    • https://cdn.sqhk.co/mogudekusab/jjMijig/11029736199.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sisadeb.rf.gd/navy_seals_or_marsoc_marines.pdf
    • https://s3.amazonaws.com/jojitagifuva/tezifewif.pdf
    • https://s3.amazonaws.com/xefejevife/jozevofom.pdf
    • http://velupar.epizy.com/84930180290.pdf
    • http://sewekovekejir.epizy.com/31943533809.pdf
    • https://s3.amazonaws.com/rezugekolaba/2772310873.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_off0000ee2f.bin
6847b7a5bf9587dcd0dfd93f55fd8b6bb9d09cda7acd9bfd53c732e20ffc8acb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 5064 bytes
font_01_sfnt_off0000ff73.bin
d2b19b760270bcd611cc5056230e54d96612637c4bdb980e69eff97c68fea0ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 10892 bytes