Malicious PDF — malware analysis report

Static analysis result for SHA-256 247368fdb84155e0…

MALICIOUS

PDF

83.6 KB Created: 2021-05-15 22:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9d7c7bcdadbe8882268846efac05619b SHA-1: afc588a947fb073d1d23fcffa91793af35eb86ce SHA-256: 247368fdb84155e0e69dfe24319c0f4aa5fa063e5b2135cca4f982c6c35e2ce8
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to obscure the ultimate destination or host malicious content. The document body, though heavily obfuscated, contains a lure related to recipes, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://fokemale.ru/strik?utm_term=char+broil+electric+smoker+recipes+chicken+wings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387406/normal_606cd55b3ff99.pdfIn PDF document text
    • http://taygerr.com/nufanasemufegupfn1vg.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/merepatemejovot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448719/normal_602841d687a42.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/570bfa.pdfIn PDF document text
    • http://maritimog.medianewsonline.com/12833115315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_6067fe2739663.pdfIn PDF document text
    • http://on24-system.club/72049148162wzl0m.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/puzolagonomigaxilo.pdfIn PDF document text
    • http://fortysgjdk.fun/line_6_pod_pro_manualdtff6.pdfIn PDF document text
    • http://reduslimer.website/tutekutotivunabx8zru.pdfIn PDF document text
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/rubatewi_giwebekom.pdfIn PDF document text
    • http://innov-cis.net/paul_hollywood_s_pies_and_pudsd4fpe.pdfIn PDF document text
    • http://smilex.club/pufabisuhfvqd.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/black_swan_taleb_book_review8yj3q.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/wonupil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_605b34d26d50b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_41d0befb02e2455bb2bb724fbd936d4a.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_6c4492fd2d2f4315aab04fead3d0a3c3.pdf?index=trueIn PDF document text
    • http://xusapibu.onlinewebshop.net/where_is_the_product_key_on_my_acer_laptop.pdfIn PDF document text
    • https://76c87692-cca9-4651-be8e-de6412dad411.filesusr.com/ugd/fdad67_301d3b31a72440a991d2664e319fae70.pdf?index=trueIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_b5b6edf257a14b629e89fb4a9929e8f7.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_ae516066be8d47d682e80e9f4239c546.pdf?index=trueIn 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_off0000f935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 5456 bytes
SHA-256: 189eb6479671cef6459daaf9e19bec03e9e26b17b80ae6b54dfbafc7a92dd141
font_01_sfnt_off00010bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB3 11384 bytes
SHA-256: 8d2c95142be8554697e964a78cbaeebefb83c17bb31f9cd5ca73e908dd7be8d3
font_02_sfnt_off00013271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13271 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2