Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2e30505b8b9436…

MALICIOUS

PDF

66.1 KB Created: 2020-11-28 00:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 254be2607595f06f361ae5914ff33576 SHA-1: 303f6228da569c44715fe54d343bf72faec608aa SHA-256: fd2e30505b8b9436508b3c2c8451231f47d1095c5eb92d322606c9a8b3a4a91e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to link farms hosted on disposable domains, a common tactic for phishing and malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating an attempt to direct users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=pallet+slip+sheet+definition PDF link annotation
    • https://mejebogisoxofix.weebly.com/uploads/1/3/4/6/134606558/8460613.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/7165872.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/litap.pdfIn PDF document text
    • https://fikenetefi.weebly.com/uploads/1/3/4/7/134771518/55646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5fb028c454ac7.pdfIn PDF document text
    • https://golotewojedonam.weebly.com/uploads/1/3/4/7/134767862/deduxo_bokirip_xenudavek_jetiwira.pdfIn PDF document text
    • https://zasiranel.weebly.com/uploads/1/3/4/5/134507270/2357927.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/midipes/76263096271.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/kojajuzimorezofufaxuxet.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/zudomozawitovosa.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/ne_game_and_parks_hunting_seasons.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/gamekit_gift_codes_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/nipoja.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_off0000c642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC642 5032 bytes
SHA-256: f41253950ff4904ada42b752e676969f0e8d03669cd2b5053b16a83bcb5136aa
font_01_sfnt_off0000d765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD765 10560 bytes
SHA-256: ed4f60edbfc4a0aa9a970cc1a289ace24057926b5d8339c0c6d9b5a7c28a6866

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