Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6bfe5c39f4295e…

MALICIOUS

PDF

78.7 KB Created: 2021-04-03 15:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5260c59482d4dc4440e0fd4f7f20072a SHA-1: df5ba3a5e04094c3606172700b4ac51384b745e5 SHA-256: fd6bfe5c39f4295e2381a2c1200c53593f4e103da932a05d8c1340a1e502edd0
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 0.9994

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://fokemale.ru/strik?utm_term=ikea+malm+bed+parts+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450513/normal_601f581f9c7bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5ffcbed0532e8.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/wiegehi/26921242260.pdfIn PDF document text
    • https://cdn.sqhk.co/verikiweneza/aWw1hbO/90530730508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5fd2dee64dc77.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/b5jcrZL/febeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416496/normal_5ff926c88c635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495058/normal_6018e5afb2874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_603def19b6439.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/gjD9ivY/83778824213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_6050076d381e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf729d73-15c5-4aa8-8165-d1ffbcb7f9b7/98028103494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1217f5ef-6710-4bd0-8570-1017974ea5e8/97512162087.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/free_nonprofit_board_meeting_agenda_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6291bc-ecfa-4d64-88b1-b7158b6b6c10/study_plan_sample_computer_science.pdfIn PDF document text
    • http://xifudovolamam.epizy.com/10830660364.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/meri_pyari_behaniya_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/personality_assessment_inventory_free.pdfIn PDF document text
    • http://wifudozakiteg.epizy.com/monstrous_word_meaning_in_urdu_analyse.pdfIn PDF document text
    • http://gebutetivifupa.epizy.com/shiva_cartoon_2019_3gp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f133f9-57aa-436e-aced-a148d4c96f83/68233124225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1e716f-0c07-4ead-99d7-3b35fae4f6ca/penole.pdfIn PDF document text
    • http://ledukuxadom.epizy.com/20899017202.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_off0000f346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF346 5244 bytes
SHA-256: 7db7535e3e787ad14939901e38194c9683934aee4ee872c0a63ec0ab48e01e57
font_01_sfnt_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 12044 bytes
SHA-256: 05f170e0976d1ddd9cc0f6493a196bc478fd2fe95566ecfe52c0bed8e3601474

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