Malicious PDF — malware analysis report

Static analysis result for SHA-256 0487a7d0220b27c0…

MALICIOUS

PDF

76.0 KB Created: 2021-02-20 04:38:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9d9d2a5902df6b117e236ced181097c4 SHA-1: c5117eca411f87958225939a50b556dbdeee3f5a SHA-256: 0487a7d0220b27c0530d64ac43ae731a2bf57b4960a049ea96738f35c5c0eb01
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains a search query that serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=what%20does%20the%20fitbit%20flex%202%20do PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486363/normal_5feb7ac71fe6f.pdfIn PDF document text
    • http://ins.expert/run_an_empire_review3llee.pdfIn PDF document text
    • https://tebojizo.weebly.com/uploads/1/3/1/4/131406069/3240a.pdfIn PDF document text
    • http://pravagims.net/xanometavokidegojapikodyug2l.pdfIn PDF document text
    • http://vipadobosu.iblogger.org/nupoxerubezubirujudaf.pdfIn PDF document text
    • http://alisaborodaenko.design/75150111729pgnue.pdfIn PDF document text
    • http://zobebukore.22web.org/90762764753.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/9841140.pdfIn PDF document text
    • http://sberin.xyz/35634294524fut9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5fd8afc030b33.pdfIn PDF document text
    • https://nutomejeti.weebly.com/uploads/1/3/4/7/134702699/tevoposovenodo_tijagu_jetugavewinus.pdfIn PDF document text
    • http://parralax.net/perceval_le_gallois_rsum_par_chapitretquiy.pdfIn PDF document text
    • https://dotaterezisal.weebly.com/uploads/1/3/4/7/134771172/puziremaduzuwu_vometo_norarimikebo_fedegaluzeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389090/normal_5ffdf167402d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://watafewajur.rf.gd/kugopolasuresi.pdfIn PDF document text
    • http://jajojamoxarug.epizy.com/20048460716.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/lcm_of_6_and_8_answer.pdfIn PDF document text
    • http://rilevoka.rf.gd/perchlorate_ion_formal_charge.pdfIn PDF document text
    • http://bagozorox.rf.gd/46581071936.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/tovegerakumudeveperuda.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_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 5252 bytes
SHA-256: 94f0a24bee9d54439edbb9b4c126fe7d9f293133f105bc5c126b3c3bf814b9c5
font_01_sfnt_off00010047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 10292 bytes
SHA-256: 1fc23e05b4e8401ff20571dc29af87d15c8699207b3ca1ddfd034025536200b7

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