Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d2853acf8d2d19…

MALICIOUS

PDF

80.3 KB Created: 2021-03-06 19:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: bb313c414748a54bf05850033de14b1e SHA-1: bc3e64523e7ee2f012b26e99e6cbbf750c2b2e25 SHA-256: 17d2853acf8d2d19e4cfe1e89e0185988b2c728e8a7fc8c8e8fd5ceb8e5390e5
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several heuristics flagging them as suspicious link farms and invisible links designed to lure users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://midufefew.ru/wix?keyword=persona+3+hanged+man PDF link annotation
    • http://duzujubafiv.22web.org/how_to_write_a_proposal_grant.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445326/normal_6025778a594df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501367/normal_5ffba34e66d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_5fe6ff82bd1a7.pdfIn PDF document text
    • http://eurosett.net/nodavobcgjbw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_603c6307dadbc.pdfIn PDF document text
    • http://dusexixegiseves.iblogger.org/exercices_corrigs_sur_les_bascules.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474992/normal_6023d21e5d3bd.pdfIn PDF document text
    • http://getizibibi.22web.org/40568580334.pdfIn PDF document text
    • http://znasila.ru/coaching_and_mentoring_manuales9j5.pdfIn PDF document text
    • http://com-signto5.xyz/dafitazemazixaja6sqwl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5fff330ca94cf.pdfIn PDF document text
    • http://ig-supportcenter.xyz/benedetta_porcaroli_net_worth3q2l0.pdfIn PDF document text
    • http://hurricane1.space/4137940951zethz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530937/normal_5fe24d4b7f391.pdfIn PDF document text
    • http://mobile-media.moscow/how_to_replace_a_hot_water_expansion_tanklupwh.pdfIn PDF document text
    • http://es50off.pro/59486070410ddx65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9aadf9-b0da-4b10-bc64-d8969ec02d1e/how_did_the_family_members_die_in_coco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177ebd5e-6a54-42de-bfa7-8590c5110331/33024604066.pdfIn PDF document text
    • http://galexuduxegi.epizy.com/is_prodigy_worth_it.pdfIn PDF document text
    • http://tazipebikitunir.rf.gd/big_endian_and_little_endian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0517e98d-f1d1-43e0-bfb5-ddc867cf23b7/78219819168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf17201-62a4-4650-a2a8-630d25db51ca/75812837846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0ef040-74fa-4ae8-83a8-8de4aa658231/stock_market_live_ticker_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 5484 bytes
SHA-256: 49a2e8b52f52ba0cdd654698b12575f731967f225cd440d00733e00c7686bd69
font_01_sfnt_off0000fdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 5372 bytes
SHA-256: e9cf306e2c1251d32196bf373e0ebf0599a2f777c9a27f64e6f22b4b7e59dd30
font_02_sfnt_off00010fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC4 10600 bytes
SHA-256: 480b164f9a058e3c55a9f96ac38488c01569e5edb74d2a9a0d798915ed091a50