Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f43e9b5b25bfec…

MALICIOUS

PDF

76.8 KB Created: 2021-03-04 10:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 634bf4f7e2104e512f4b91d8fd69c693 SHA-1: 653856182be7a48541754b471246cf6cc1ba51fc SHA-256: b2f43e9b5b25bfec622d49c08085349cfe337451940fe58ff8ff86b2d1edb313
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support a phishing or malware distribution attack pattern.

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://maypoin.ru/strik?utm_term=aroma+digital+rice+cooker+white PDF link annotation
    • https://sovevalejuwup.weebly.com/uploads/1/3/1/8/131858043/4332447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_5fdc878c6ba28.pdfIn PDF document text
    • https://jurisosisirebak.weebly.com/uploads/1/3/6/0/136086550/vitemibosazoze.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/ieF9s7F/mcat_registration_2020_nts.pdfIn PDF document text
    • http://goossyy.online/graco_pack_and_play_weight_limit_topncdc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460968/normal_5fedeed0dacbd.pdfIn PDF document text
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/vegibevefusovor_waluwibar_liliwite_demep.pdfIn PDF document text
    • http://artyom.guru/how_do_i_reset_the_lc_code_on_my_samsung_dishwasher4be23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_5fd095ddb53d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423757/normal_60344fe05b0cc.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/Vhfgcjc/sonnys_rv_store.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/7ggfgdG/inside_out_2020_cardiff.pdfIn PDF document text
    • https://nutarubanamu.weebly.com/uploads/1/3/4/5/134528768/julim.pdfIn PDF document text
    • https://cdn.sqhk.co/bimeniwog/Qhjaeib/minugufawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411922/normal_601bd1b7264ce.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/jikopot/chitralahari_full_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/73106607317.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/rigilolap.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_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 5320 bytes
SHA-256: 1444aae0c98617585a4c0ca1081724ee6a9507b1abbbe5014d5ca02bf4dbc917
font_01_sfnt_off00010210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10210 10476 bytes
SHA-256: 86e505a2b43b5be35227115094742977a41379e8f2d35c22881d0571f59c93e2

Open this report in the interactive analyzer, or submit your own file for analysis.