Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e45bb279e0a9fd…

MALICIOUS

PDF

87.6 KB Created: 2021-03-29 15:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e90a519141e0b01bd3ab00bd4b378a2a SHA-1: 1f925c1bbc8c637cf202dca40a799d4bbbade159 SHA-256: 72e45bb279e0a9fd7993000feb53ddb973610fe2a1d1205909d6607d17fb794a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The PDF's structure and the high number of external links indicate a deliberate effort to distribute or obscure malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=meade+lx200+16+inch+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5fd312290892b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494673/normal_5fff091caa4a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367290/normal_5fe58f7b61362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5fde0eca6c11d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fd260f4b0719.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/idQjahg/74250927392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_6039c56a1758a.pdfIn PDF document text
    • http://gawivekarebuvus.22web.org/xuzekuwugukatowuweno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_60005fcb9ab7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_6019d7bc55cbb.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/eTevgeY/electric_guitar_learning_book.pdfIn PDF document text
    • http://milesatel.mygamesonline.org/14167159128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5febe3e99b33a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_601b7c6b5f76d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5fdb7c3e9cd3c.pdfIn PDF document text
    • http://jolidulikan.scienceontheweb.net/15191058426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_6061701deefce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwirosogop.epizy.com/dojababakilevolerin.pdfIn PDF document text
    • http://vipukexevuwe.epizy.com/black_eyed_peas_music_list.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/husqvarna_chainsaw_235_manual.pdfIn PDF document text
    • http://nojekakanafigi.rf.gd/10543928274.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/padma_bhushan_award_2020.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_off000117b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B2 5456 bytes
SHA-256: ca3a7a24692f8afad3d0955aeb9cb4fa901d16f3186372a699beee852bfaf6ae
font_01_sfnt_off00012a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A33 11768 bytes
SHA-256: 9ce0f89006b9e80140613919cd3ae9af822edaf1d2ffc19d3bddd12b38f314ef

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