Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b10938b312af232…

MALICIOUS

PDF

75.3 KB Created: 2021-04-14 21:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 42f3028a04e61aab9196658cf4f593fe SHA-1: eaec2973c7e76a044fceb43d34531d1c2e466078 SHA-256: 8b10938b312af232188514ed6177e2378a2959c10905a03ae192633d4dc049f4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://jottigo.ru/strik?utm_term=how+to+tighten+bobbin+tension PDF link annotation
    • http://jaralet.getenjoyment.net/14472360705.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/what_is_taco_bells_new_5_box.pdfIn PDF document text
    • https://sebigazawipad.weebly.com/uploads/1/3/0/8/130814057/nafikidewegofozu.pdfIn PDF document text
    • http://sadovik.me/bijelifexojaferoddveu9.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/1c368.pdfIn PDF document text
    • http://kolomata.ru/nepiwikirakoloxutun683qb.pdfIn PDF document text
    • https://dewokazivefin.weebly.com/uploads/1/3/1/4/131437233/viguvel.pdfIn PDF document text
    • https://bigorofepomibed.weebly.com/uploads/1/3/4/4/134400252/lanikamonataxebije.pdfIn PDF document text
    • http://copyrightproblem.com/five_nights_at_freddys_free_download_pc_full_versionq1me6.pdfIn PDF document text
    • http://top-salez.site/uk_standard_electrical_symbolsxk3z5.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/809d3c25-9bf5-4bc1-88c5-985c28388b59/gopixa.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/paul_beatriz_preciado_testo_junkie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa08c483-d54f-41c3-b457-fdca01eb34fa/lekolob.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/how_to_draw_anime_heads_from_different_angles.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/fexamul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4d168c-74f2-4fe3-918d-e847b2671552/gilles_deleuze_postscript_on_the_societies_of_control_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec0fbc29-faae-4953-b91b-2238fd63e480/soundlogic_xt_diamond_wireless_speaker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18fbef0e-1ef2-4a77-914a-38708e9e59e6/wivezipilova.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 4800 bytes
SHA-256: 4b9b4ca508ae03719bda914acdb21319de062d0c11e06dc3382c8037c35187b2
font_01_sfnt_off0000facb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 10960 bytes
SHA-256: d87be031680495905c3499d17abbe9ee27a478173f088a57e569a4d842667056

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