Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c284d124fd7573…

MALICIOUS

PDF

68.1 KB Created: 2021-01-30 22:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 842082d41397ee82b0f1e24e5a0e34d3 SHA-1: c6db3c8adb86f1c0a793f1234f81bac897fc7c39 SHA-256: 19c284d124fd7573a6ac6eba150a0a9c9075f9ae63bd81806b720064d607b66d
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it's a link farm on disposable hosting. The PDF contains numerous embedded URLs pointing to various domains, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and the presence of external links strongly indicate an attempt to redirect the user to malicious content.

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://maypoin.ru/123?utm_term=limiting+reactants+gizmo+answer+key+pdf PDF link annotation
    • http://byt-upak.ru/rubewawazafumigujonuztd8xt.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/nipalusuvulatu_fajiva.pdfIn PDF document text
    • https://kigumafu.weebly.com/uploads/1/3/4/1/134131380/1958168.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/6688508268.pdfIn PDF document text
    • http://lnstagramsupportlives.com/bowapujolaviwukk93x2.pdfIn PDF document text
    • http://girlsbeach.space/aristotle_rhetoric_summaryzdx00.pdfIn PDF document text
    • http://bestunew.xyz/wxpython_quick_guide5r6h5.pdfIn PDF document text
    • http://alluniversity.fun/kajinm9j9f.pdfIn PDF document text
    • https://cdn.sqhk.co/jorubili/jcwRjev/vijesaxulefijezebosuxe.pdfIn PDF document text
    • http://sport-stavki.fun/fogely70zd.pdfIn PDF document text
    • http://giveaway2020.info/blocked_phone_numbers_on_my_iphone5nniv.pdfIn PDF document text
    • https://fadapezak.weebly.com/uploads/1/3/0/7/130775088/wigifazeg.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/ghagiD5/don_t_rush_slow_touch_song_lyrics.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/tovitaxuxenukafis.pdfIn PDF document text
    • http://trudogoliya.online/kamasutra_book_with_pictures8p09t.pdfIn PDF document text
    • http://edapog.online/tedamodiwiwibnlzk.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/Yo0IqQn/wrestling_revolution_3d_pc_mod_wwe.pdfIn PDF document text
    • http://miiliioner.xyz/79150993107t1hv7.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/gjgjV2p/round_corner_rectangle_adobe_illustrator.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC33 5692 bytes
SHA-256: 99845d5e5e5746c40643fa8ea68f427da14fba43bf5280e972ea59d119d2a8ce
font_01_sfnt_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 10564 bytes
SHA-256: 9ab7b94f6426dee0d87a533238cfedcb3f384335bee302d19c5e8850c02b51be

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