Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd1fe30496d0ee1…

MALICIOUS

PDF

97.9 KB Created: 2021-03-20 00:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 390bb503e90a6e31a861a2858a222093 SHA-1: b1a663d45aa7c533630215ace00620ba3314f64c SHA-256: ebd1fe30496d0ee1befe89a7d28e7f7b60193e257931bc4e6ddee773bf4f1d6c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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.
  • 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://jumiwimov.ru/123?utm_term=reprendre+confiance+en+soi+livre+pdf PDF link annotation
    • http://mp4.design/construction_business_plan_sample_pdijx1x.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/lepilunuvapomimozuwoxobuj4bhf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390382/normal_604ce817f296c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413978/normal_6002474bad851.pdfIn PDF document text
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/dab9b04.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/0c8bc3c7bf.pdfIn PDF document text
    • http://omoikiri.info/11140429046h5vhn.pdfIn PDF document text
    • http://ramuwazezu.22web.org/td_bank_compliance_officer_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_600a04f49a771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479454/normal_5ff44af70cc5e.pdfIn PDF document text
    • http://saudiautoinsurance.com/99946509829mms6r.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/25167908392.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sanikivatuma.rf.gd/91303591023.pdfIn PDF document text
    • http://bifezuragumizi.rf.gd/cellule_vegetale.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/78076826078.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/sunbeam_planetary_mixmaster_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/puwefinoxafataderuxeli.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/pokemon_cartoon_full_hd_wallpaper.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_off00013e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9C 5216 bytes
SHA-256: 627d57cf5b442e40e89b6f8323011ce09b72e7293a44b6b3223da7c6c291ff2d
font_01_sfnt_off00015075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15075 13128 bytes
SHA-256: 9d434309b3a55b9ff605a31382e0023ed3545f0250ea189ad07737b07a0362c0

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