Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbf0a67e345b75e…

MALICIOUS

PDF

103.0 KB Created: 2021-02-27 20:27:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 745fcd43b96529e8213953e9b0e9ac5b SHA-1: b0f09b5782e0c45e3ca55743f03efda15eef59c8 SHA-256: 1dbf0a67e345b75e6bab3361a03a29037d033625462bf96400cdbe1105e53f9b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or link farms, indicating a phishing or ad-revenue generation scheme. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM firings strongly support this. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it's designed to redirect users to malicious or ad-heavy websites, potentially as part of a larger phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/award?keyword=libro+la+iliada+y+la+odisea+de+homero+pdf PDF link annotation
    • http://devlp.design/56026906401j77f0.pdfIn PDF document text
    • https://lagubezawepafu.weebly.com/uploads/1/3/1/8/131856446/nixirimako_kojop.pdfIn PDF document text
    • http://rizusapi.22web.org/youwave_android_emulator_system_requirements.pdfIn PDF document text
    • https://nanagupuwaxa.weebly.com/uploads/1/3/5/3/135322083/bc4f4a272.pdfIn PDF document text
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/boridagitufemat.pdfIn PDF document text
    • https://rimimasosonajis.weebly.com/uploads/1/3/2/6/132681992/57c4091ea4.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/36919659316ini7z.pdfIn PDF document text
    • https://luvatuxi.weebly.com/uploads/1/3/4/3/134321506/dopabotiru_segara_govefadatixop_lekas.pdfIn PDF document text
    • http://itclick.info/lunosodopn6ho3.pdfIn PDF document text
    • https://taxajefikudo.weebly.com/uploads/1/3/4/7/134765143/tavuru_widejasijuk_jexug.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/72069928013u0a8l.pdfIn PDF document text
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/9663fa8072f3.pdfIn PDF document text
    • https://mojavopadagesit.weebly.com/uploads/1/3/5/3/135383036/woxix.pdfIn PDF document text
    • https://dubujede.weebly.com/uploads/1/3/4/6/134607356/timasotajalekakarin.pdfIn PDF document text
    • http://nefuwumimo.iblogger.org/social_psychology_journals.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tidukalimipeba.epizy.com/65017357491.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/hooked_inc_fish_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/bootstrap_responsive_sidebar_collapse_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/91099251595.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C8 5064 bytes
SHA-256: 02fd9e21f396c59698f3a9eb81fde16b67da81829c0b8f551aa0e5a4475b576c
font_01_sfnt_off000151f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151F3 14612 bytes
SHA-256: c754898a706ce6debb528d53be7eb923863fe6ff71ebb1f8ffab9d89bb72f877
font_02_sfnt_off00017e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E51 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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