Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d062a1b25706421…

MALICIOUS

PDF

89.9 KB Created: 2021-02-26 13:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 55b371364e15d72a068f63fda978da3e SHA-1: 6741f14fe870cc308f88d5a8a50e8818fd315e85 SHA-256: 9d062a1b25706421a551e01e94f7a6eb3003923d3868ede28aa66b8fb5543a6e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting, reinforcing the phishing or malware distribution angle.

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://botokaw.ru/award?keyword=samsung+hls5687wx%252Fxaa+lamp+reset PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501804/normal_600f64b35a136.pdfIn PDF document text
    • https://xizadububexo.weebly.com/uploads/1/3/4/5/134595199/6486579.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/fhaifhf/moonbox_sandbox_zombie_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/E4rhd5J/fapokimano.pdfIn PDF document text
    • https://rojanebe.weebly.com/uploads/1/3/1/6/131637229/nodukizisilikip.pdfIn PDF document text
    • http://ellmax-site.xyz/briggs_and_stratton_18.5_hp_engine_mk4uir.pdfIn PDF document text
    • http://desokore.medianewsonline.com/30328413146.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/bhcMgiD/fudokibib.pdfIn PDF document text
    • http://bunnygummy.ru/dj_sounds_effects_mp3_downloadigxtz.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/what_is_norse_mythology_based_on.pdfIn PDF document text
    • https://losiweso.weebly.com/uploads/1/3/1/3/131380476/sarawejowo.pdfIn PDF document text
    • http://musofiron.ru/bagpipe_sheet_music_thunderstruck7lwnm.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/4ffb3f3400.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472764/normal_5fce43f16f3cf.pdfIn PDF document text
    • https://somalinoduka.weebly.com/uploads/1/3/5/3/135392385/6479c3a2f4103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379474/normal_5ff163c77ed27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454304/normal_600faf535a58f.pdfIn PDF document text
    • https://xibatelilon.weebly.com/uploads/1/3/1/6/131637149/4670471.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/is_there_a_romeo_and_juliet_law_in_new_york.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0A 6084 bytes
SHA-256: 545097b230493b03dfd11b45e2046da0783ddc2212dff0c5a3024e76759a4f64
font_01_sfnt_off000132b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B5 12140 bytes
SHA-256: 72ff7ce45f5e7a5f6632e21c313b6a8d28241a8de389161b7b6e443441792357

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