Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d9ec0ffd0ee5df…

MALICIOUS

PDF

74.8 KB Created: 2021-03-19 04:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 94ba0d305a61ea124818fb937f68d33d SHA-1: 5794b1835bc085ff358ec068516f7580bd899519 SHA-256: e5d9ec0ffd0ee5df85caf81cb21e9023af77ac16c5b066028cb4e235889cfb36
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=tolo+toy+car PDF link annotation
    • https://cdn.sqhk.co/fogibadeku/G5ijDtS/bekonutu.pdfIn PDF document text
    • http://baltika-trans.com/how_to_determine_electron_domain_and_molecular_geometryrtbhf.pdfIn PDF document text
    • https://cdn.sqhk.co/supekokabe/Ogdjejg/julekojizepinomizizu.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_604f47a073fcc.pdfIn PDF document text
    • https://cdn.sqhk.co/zevijevam/TIJlge0/39505687334.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/hgdxQgg/yellow_white_pages_columbus_ohio.pdfIn PDF document text
    • http://ptmonline.ru/power_air_fryer_elite_steak_recipesfyg3c.pdfIn PDF document text
    • http://vipmanmarket.space/how_to_update_snap_on_solus_ultran0jji.pdfIn PDF document text
    • http://prizinsta24.space/3276420534qdc96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504641/normal_602ab49bc93ae.pdfIn PDF document text
    • http://familyit.pro/70566873555k3s39.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/dBUkM99/banekegoroxumuxosapupa.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/solving_linear_equations_with_variables_on_both_sides_worksheet_with_answer_keyn46ko.pdfIn PDF document text
    • http://olipaka.xyz/antonym_and_synonym_worksheet_ks27acfc.pdfIn PDF document text
    • https://jikufowawuful.weebly.com/uploads/1/3/2/8/132814232/jalaral.pdfIn PDF document text
    • https://dagaroxir.weebly.com/uploads/1/3/5/9/135973008/bemukunepo-piluz-wugadoliwexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 4664 bytes
SHA-256: e7eccc700b2029187d4d659b8be9a3f84217fb9b99097c216d7cc720abcd4bf6
font_01_sfnt_off0000f96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96D 10856 bytes
SHA-256: 6ded627c7aefdb7ac51b12d262bc6253b5ec153fdfc7e9d06e09cd9383beff10

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