Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b726d0803b8f52b…

MALICIOUS

PDF

89.9 KB Created: 2021-03-31 14:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: af137b7d829d9ee262bbf82f69075e75 SHA-1: 114e14bdc1886e57e50e961955e99b4f463b670d SHA-256: 1b726d0803b8f52ba7ff283c631205bc14dac1c15e779b54e978bc7429c6fd32
186 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to external websites, many of which are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The document body's title, 'How to open lexus car door with key', is a lure to entice users to click on these links. The presence of ClamAV detection and ML classification strongly suggests malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://seumenha.ru/strik?utm_term=how+to+open+lexus+car+door+with+key PDF link annotation
    • https://cdn.sqhk.co/filomada/U3VnPZr/swing_states_in_the_us_polls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_603e3922ccb57.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/nitegoxekomupoli.pdfIn PDF document text
    • https://nunavataregexo.weebly.com/uploads/1/3/0/7/130775742/mopidajo.pdfIn PDF document text
    • https://fazerirusabutef.weebly.com/uploads/1/3/1/3/131381144/2934572.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/giLTx5I/build_it_better_lyrics_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_60605d048d4f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5ff7c954f258d.pdfIn PDF document text
    • https://voxalasodakuro.weebly.com/uploads/1/3/4/0/134042561/779798.pdfIn PDF document text
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/xadalamatave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_603086f80a89c.pdfIn PDF document text
    • https://xisiwifuroki.weebly.com/uploads/1/3/5/3/135323104/7997412.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369143/normal_5fcc93598f076.pdfIn PDF document text
    • https://gizipiwiro.weebly.com/uploads/1/3/1/4/131454158/8038249.pdfIn PDF document text
    • http://zilijakal.iblogger.org/punenisu.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/mijjghn/stickman_parkour_crazy_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesodabat.epizy.com/new_movies_website_free.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/latitude_14_5490_datasheet.pdfIn PDF document text
    • http://lunijikujapike.epizy.com/mezedavevisop.pdfIn PDF document text
    • http://risetozo.epizy.com/27634039599.pdfIn PDF document text
    • http://liruvumud.rf.gd/22390504292.pdfIn PDF document text
    • http://vetanafajodomek.epizy.com/34841121608.pdfIn PDF document text
    • http://vuwadiwotaja.rf.gd/ramubusezijuvewuk.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_off00012060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12060 5448 bytes
SHA-256: 557050cfce2aca151ace8b775cbe3c344f72a86c8d25611d8f1ac2b89bbf7f6e
font_01_sfnt_off000132f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F5 11680 bytes
SHA-256: e1c16c7b1504c666171aa17985fec0f816fd8d99616f7b5ff3836b682229b706