Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edae4c17d15c692…

MALICIOUS

PDF

83.4 KB Created: 2021-03-19 18:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 91e4234a3d3abbd3b9291f36962433cb SHA-1: 6e14d9122d239c9b564c96f23965acda4d245de9 SHA-256: 0edae4c17d15c692e6103cd14199472178ec51527ba84eb34d773ce0d12bf37a
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains a significant number of embedded links, identified as a link farm designed to redirect users to potentially malicious websites. Heuristics indicate these links are hosted on disposable infrastructure and point to known malicious redirector domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://dafemum.ru/wix?keyword=manual+of+ornithology+pdf In PDF document text
    • https://cdn.sqhk.co/gudijupimeb/hgCiMia/fly_fishing_swing_technique.pdfIn PDF document text
    • https://rabupipimefife.weebly.com/uploads/1/3/0/8/130874594/e60d4177ae.pdfIn PDF document text
    • https://sarajigirokoxi.weebly.com/uploads/1/3/5/3/135300612/vedox_paligilovedu_sujap.pdfIn PDF document text
    • http://seomagnat1.online/bifuxeruveworejolipedekagkomn.pdfIn PDF document text
    • https://jejaparax.weebly.com/uploads/1/3/5/3/135332208/40386505eb5a95.pdfIn PDF document text
    • http://mirror-x.org/supiziwafudixirakopa3vfqh.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/vorowinemitoxixuro.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/gFoGPie/35836536722.pdfIn PDF document text
    • https://jexepasevotapak.weebly.com/uploads/1/3/1/6/131606223/namowixeraxibo.pdfIn PDF document text
    • http://ideaita.fun/nijiguzixatinaxisurib98vc.pdfIn PDF document text
    • http://meetsalon.xyz/92827064826raann.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/nonipesikiri/antibiotic_essentials_2017_15th_edition.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_b83ec13415c143628d75386d262937cc.pdf?index=trueIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_feeb15cf25a742ad8d4f5ed8bd0f7e8e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/48699443476.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_384d1e9294dc402db958fbcb33155636.pdf?index=trueIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_689745b889bd4f04ac886bc5bdb44aea.pdf?index=trueIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_680cd2af8c9641a3970144713a6a8e19.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_cefa8a0e3f9a406f8cc945d9b6554129.pdf?index=trueIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_f43b0f4918714f95844334640beae0bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toguvaju/martyrs_movie_hd.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_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 5232 bytes
SHA-256: 2d98cdcd74281d815127c92d6e2ac1ece84ec0b6ffdc2a134d2963be501e76dc
font_01_sfnt_off00011a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A00 11168 bytes
SHA-256: 3979d26cdd7ef3cb6c2da505b73ee0e06f87963eaec104f4f3407758b84f1c0a