Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b60889ae530e5b…

MALICIOUS

PDF

79.8 KB Created: 2021-02-17 15:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1bf7e7767e5e3cbea369ec5512451d86 SHA-1: ea3310831e8f4a8d0ce7d9222252b917af3d5046 SHA-256: 44b60889ae530e5b4ad42a1bd17881fc1da506064e4859e45dcf93c0979da413
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'remote car starter cost', directing users to potentially malicious websites. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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 https://leonvi.ru/wb?keyword=how%20much%20does%20a%20remote%20car%20starter%20cost PDF link annotation
    • http://folivapizi.66ghz.com/freelance_consulting_agreement_template.pdfIn PDF document text
    • https://pigokujedaxe.weebly.com/uploads/1/3/0/7/130740563/rijoverob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_60095f1ba8748.pdfIn PDF document text
    • https://vatilevemuwaji.weebly.com/uploads/1/3/1/4/131453872/964ab88f2b4fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427519/normal_5fe00e8de6e94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5fca28768246e.pdfIn PDF document text
    • https://vogoniboka.weebly.com/uploads/1/3/1/0/131070279/4722886.pdfIn PDF document text
    • http://tehnikator.ru/81889320408p4xy3.pdfIn PDF document text
    • https://sujanumijixedi.weebly.com/uploads/1/3/4/5/134501714/xokivoleto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_602aa85fcfc53.pdfIn PDF document text
    • http://wezugeviliwibu.iblogger.org/arn_anderson_podcast.pdfIn PDF document text
    • http://bloodcraft.online/jezojotozewirofodinoxozi72rkk.pdfIn PDF document text
    • http://watewuwij.22web.org/54961062528.pdfIn PDF document text
    • http://podjem2.club/33490468912s4ets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novufojanaka.epizy.com/pajizipor.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/63525690802.pdfIn PDF document text
    • http://kosuvoz.epizy.com/lefurav.pdfIn PDF document text
    • http://punegejofuj.epizy.com/auriel_guide_hots.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 5200 bytes
SHA-256: 95af765f6e667d2c776abce8edfc29bc7dd256ed9da8fff275e5177704def76c
font_01_sfnt_off00010d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8D 10584 bytes
SHA-256: c968c947aa14752d1b30aba3100c118cea051da699068d8962b2a6256391b2b2

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