Malicious PDF — malware analysis report

Static analysis result for SHA-256 709297d487d81170…

MALICIOUS

PDF

74.0 KB Created: 2021-04-07 08:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 34f5ab38ec9413ed0a9cb4c902713573 SHA-1: 1793eeab621fed86e19865e4e6bef6b9630b735b SHA-256: 709297d487d81170ff283841714aef258bde2e97a100cd1394c0afd472ac664b
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://dugedepap.ru/123?utm_term=lymph+nodes+anatomy+pdf PDF link annotation
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/rozovubugevul_rulub.pdfIn PDF document text
    • http://revershjtb.site/biomechanics_of_sport_and_exercise_mcginnisvogak.pdfIn PDF document text
    • https://cdn.sqhk.co/birifoneboj/PImicgg/ziwetuwapubipapowirilewa.pdfIn PDF document text
    • https://vadalafazewa.weebly.com/uploads/1/3/4/8/134897988/5519439.pdfIn PDF document text
    • https://dezitajupimolig.weebly.com/uploads/1/3/5/9/135972910/9e66497aaf7.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/wexupukewd53zu.pdfIn PDF document text
    • http://daravto18.ru/bozunidofeu28.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/kazuvarut-nixuro-supamig-koxogabuwawi.pdfIn PDF document text
    • https://wodokapiv.weebly.com/uploads/1/3/4/5/134584818/a18189e7019a.pdfIn PDF document text
    • https://zomoxiwoginu.weebly.com/uploads/1/3/1/6/131637743/f78bdc12f5b54.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/Wujigfd/mad_max_fury_road_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/juselivo/jglhhia/41868618440.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/idaojhf/authorised_push_payment_scams_voluntary_code.pdfIn PDF document text
    • https://xinuluparos.weebly.com/uploads/1/3/0/9/130969110/99db43587718d.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/87d09262-f88c-45d1-91a0-628fdd4cb4ad/how_to_make_bat_at_home_with_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/bogosejebomavatugenixuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27477ce8-19f8-4772-a37d-f06423fd4389/successful_coaching_4th_edition_chapter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/cycleops_fluid2_bike_trainer_review.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_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 5196 bytes
SHA-256: 265b9dfb2281583fed25010209cc1e3239dda679188ff1c883695e0bf53d8d38
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 10344 bytes
SHA-256: ccb32bd099fef8e97a33a1fd326972c33357071ae7165361a53bc95bafd28618

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