Malicious PDF — malware analysis report

Static analysis result for SHA-256 12144217b80ddf0d…

MALICIOUS

PDF

64.9 KB Created: 2020-12-05 10:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e8a11ebbd0617960439dce21ae9a92c4 SHA-1: 7601f68b94511ea6bd00589309e54d93072b1a4c SHA-256: 12144217b80ddf0d39b9637fef82970a43933f9949c16f9b3c01a841f04023aa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffine.ru/aws?utm_term=android+tablet+black+and+white+screen PDF link annotation
    • https://vowijavig.weebly.com/uploads/1/3/4/3/134319359/6719540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f8e9f37702aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f875e440db5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460449/normal_5fa537b14d747.pdfIn PDF document text
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/bezave.pdfIn PDF document text
    • https://kotidirexi.weebly.com/uploads/1/3/4/3/134358756/lupefajafugozaw-zakelevewi.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/910350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_5f8a9ea689b55.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/xezulenokopege-bosujaxizuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5fa567728dfa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5fa0f486f0968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f8e05952481e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xalasawu/integrated_annual_report_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/chyawanprash_video_song_arjun_kapoor.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/a_doll_s_house_character_summary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fe2417e7202640eab110/t/5fc1721208845d0924c1433d/1606513170831/nanowigafamokegeladexi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf57a09b1ed03538d225cf/1606375329396/jekofixowa.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_off0000c22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC22E 5312 bytes
SHA-256: 19e1465308253796ed28ba225cee82bd0f12a0d44e0988931be0c77bbe8bd719
font_01_sfnt_off0000d447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD447 10000 bytes
SHA-256: 63ab48a2dcbd6c0e2bb9661ae264b734eec262472bfd21c550318bd5e2c20ef5

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