Malicious PDF — malware analysis report

Static analysis result for SHA-256 05de0ccca336a705…

MALICIOUS

PDF

72.6 KB Created: 2021-03-25 03:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 75dccca8f0d885f82892d2dcc1f068f2 SHA-1: 1c2d21e26b590cabf2fef787640dda05d7a0134d SHA-256: 05de0ccca336a705ce57b59c6b662f6bafe29544332dac858dbcd1b9dbb3d9d7
134 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 and presents a deceptive download button. 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/123?utm_term=personal+pronouns+exercises+with+answers PDF link annotation
    • http://idealica-italy.site/gsap_tutorial7861z.pdfIn PDF document text
    • http://zonitupupafof.sportsontheweb.net/livro_adestramento_de_caes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384028/normal_6005f5dfbf7b1.pdfIn PDF document text
    • http://marketes.pro/81390020407sq3q4.pdfIn PDF document text
    • http://xonigej.mypressonline.com/reasoning_ability_tricks.pdfIn PDF document text
    • http://wupidubame.mywebcommunity.org/puntos_acupuntura_para_adelgazar.pdfIn PDF document text
    • http://7gusevshop.space/kendo_mvc_grid_edit_popup_templatefim47.pdfIn PDF document text
    • http://buybritishcat.com/how_many_episodes_will_be_in_season_5_of_the_expanseidotk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_6018eccd76827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454819/normal_602d9b5694ae9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415929/normal_5ffd50dfcf201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_393dbf33195d4bb98ec5ccea255d4425.pdf?index=trueIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/42642158368.pdfIn PDF document text
    • https://b7953657-6b45-4ea9-9d9d-f701e3f26526.filesusr.com/ugd/45996c_3bd88b26389e4233bdd425b558286455.pdf?index=trueIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_93e236a427a44f18926b1aff0488ae5c.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_016d1b42378d4bc0814e3adacfed830d.pdf?index=trueIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_ddbd41e0fa334759abefa39d37aa2443.pdf?index=trueIn 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_off0000de44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 5180 bytes
SHA-256: 433813b31d76c2b93700aa3379b9ce2531a726555a1dd10ae14d0c2fa196f1a1
font_01_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 11036 bytes
SHA-256: df09cea444ace8178409d164c453e7ae794837db6b9a39ce56f0a3a3d821875c

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