Malicious PDF — malware analysis report

Static analysis result for SHA-256 695ded57da4997a6…

MALICIOUS

PDF

72.7 KB Created: 2021-04-06 13:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3dcf17f4fe798aa8ad4a1db7c2a6fba6 SHA-1: 29f1774c6b56836ca06a36f278da264cfe4e8d6a SHA-256: 695ded57da4997a684ae364d3aa9cdb9d0cc3b0a3f26015aacfbabbac7a332bb
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, many pointing to disposable hosting and forming a link farm, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities or serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/award?keyword=pdf+to+word+converter+software+free+download+for+windows PDF link annotation
    • https://cdn.sqhk.co/genizataxom/U1DF4ig/14880404809.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/dGMiajj/37107591164.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5fcd8239529c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501046/normal_5ffbae7f7704f.pdfIn PDF document text
    • https://wadumajaniko.weebly.com/uploads/1/3/1/3/131383958/1132748.pdfIn PDF document text
    • https://zigivigafa.weebly.com/uploads/1/3/5/3/135392575/barive-sakuwak.pdfIn PDF document text
    • http://kevarusakoko.mypressonline.com/pipumola.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/ghLdhbK/car_mechanic_simulator_2018_pc_requirements.pdfIn PDF document text
    • https://tuvepovuno.weebly.com/uploads/1/3/3/9/133997374/d7477fd6b7f34c.pdfIn PDF document text
    • https://cdn.sqhk.co/xesoralo/3jdAOii/lanalojubokivapubi.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/ijgejjQ/afk_arena_best_heroes_october_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417138/normal_5fe9b255c2cdc.pdfIn PDF document text
    • https://kulaxewanugig.weebly.com/uploads/1/3/1/3/131384484/zunojawiz.pdfIn PDF document text
    • http://mujubow.getenjoyment.net/breach_of_contract_letter_before_action.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490929/normal_602c4c385eeb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://benugerevum.rf.gd/bixug.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/spider_man_first_comic.pdfIn PDF document text
    • http://turebegifazuxa.epizy.com/begupodakedawirez.pdfIn PDF document text
    • http://ziwivalotezeti.rf.gd/58833396375.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_558aee34de734470ae5c9e675c735508.pdf?index=trueIn PDF document text
    • https://10bc5e17-7652-4c7e-9b43-999b3eb3b021.filesusr.com/ugd/5edc69_e4822ef3383542ae9dfe4a2a40d3359c.pdf?index=trueIn PDF document text
    • http://davutawopoban.epizy.com/tumuvuba.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_off0000deb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB1 5168 bytes
SHA-256: 31a9ea3a4d61dbf85f5eb1b68536b821d84eae71cd7dc2045b74139726edb799
font_01_sfnt_off0000f071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF071 10772 bytes
SHA-256: e92a71a4314d5e4142ab55949b8d35938d67c126f13b66763a9045c9ed5d9dd2

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