Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2ae96f6a00d904…

MALICIOUS

PDF

72.9 KB Created: 2021-02-27 17:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a7befc8b2d5b2dcbdc8c3b421867b018 SHA-1: 5e33ea7664617dc82dccf5a862076615122eb8c4 SHA-256: 0c2ae96f6a00d9049dbc23e3a9d000b0f9696116b53ffa7f8ce3e0960b35a1ae
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body is heavily obfuscated, but the presence of external URIs points towards redirecting users to potentially harmful content.

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://pelibifir.ru/wix?keyword=el+dinero+como+deposito+de+valor PDF link annotation
    • http://bomaduworofa.medianewsonline.com/how_to_make_easy_ribbon_bows_for_gifts.pdfIn PDF document text
    • https://toruvorunivigu.weebly.com/uploads/1/3/5/3/135317855/b8c4642f.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/pozezejariduv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490265/normal_60145e3d03ae5.pdfIn PDF document text
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/9a3af.pdfIn PDF document text
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/tarekegupipadezobo.pdfIn PDF document text
    • https://bogibopedazite.weebly.com/uploads/1/3/4/0/134018154/bukusizu.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/mimumuvamuvolikozu.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/nutone_allure_ws1_range_hood_filters.pdfIn PDF document text
    • http://luxshop21.site/can_you_cook_frozen_chicken_breast_on_george_foreman_grill8amwr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402724/normal_6032f2017dd1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404725/normal_5fcf2e4dd7784.pdfIn PDF document text
    • http://nesobaka7.xyz/anemia_hemolitik_anakdb7m4.pdfIn PDF document text
    • http://oyuncuxx.com/get_tinder_gold_free_trialeg4lu.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_off0000df58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF58 5236 bytes
SHA-256: 313a7f5da93b4b27d5d6e6ce3a295809716dc28c90f1cebc8713249296af0b1d
font_01_sfnt_off0000f118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF118 11048 bytes
SHA-256: bf44d1caca38ae5cb5df0240d76d99ee71989893b5893a68d42062c500cca6f9

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