Malicious PDF — malware analysis report

Static analysis result for SHA-256 336e252ba6223836…

MALICIOUS

PDF

163.0 KB Created: 2021-03-22 23:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 3394ac626b720cc1bb1ea13668b592fa SHA-1: f121499f5355dcb4a1a45114aa1356d781be14dc SHA-256: 336e252ba6223836c67b928433dee764e069b64559a99eefd13c9676d7608fed
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The embedded URLs and the heuristic detecting a link farm on disposable hosting suggest the primary goal is to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures designed to trick users into downloading further malicious content or revealing sensitive information.

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://jumiwimov.ru/123?utm_term=computer+full+form+in+english+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472188/normal_6028fe754e178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_60421d8977c23.pdfIn PDF document text
    • http://vudujupuboneg.22web.org/98442909529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_6017085004834.pdfIn PDF document text
    • http://nosagebuki.22web.org/tilev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481278/normal_6003f8d62989b.pdfIn PDF document text
    • http://xutifufaxe.mypressonline.com/10598676871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_605672b6b1f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_5fd11ad93b69c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_5fd674fba9cec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384642/normal_6003d64fce935.pdfIn PDF document text
    • http://vemudebanaj.22web.org/59689891851.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_7fe56bacdb0143cfa62d98e5d86a303d.pdf?index=trueIn PDF document text
    • http://kugibujupedo.rf.gd/dotadodiponoxatos.pdfIn PDF document text
    • http://wosoremozojofam.epizy.com/57870890621.pdfIn PDF document text
    • http://laxuraxosolun.epizy.com/sojufuritigoxinarepaval.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/kojewijemaleluzeduwe.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/a_level_cie_date_sheet_2019.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_b2e731ed371d4ddd939892d108df562a.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_off0002348a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2348A 3492 bytes
SHA-256: eca1bfea6540ea96e57f54f348002d0a98fb5896c0b613de4745e8dacd253963
font_01_sfnt_off000240ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x240EC 5152 bytes
SHA-256: cbfab9137a0358cd560b4ab2dc3eaf5c3a1f475492f951315a0445f6901b32a9
font_02_sfnt_off00025247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25247 13884 bytes
SHA-256: 59e47c351b596139bcb861418875331e146a0d81baf2b98de2ec6c9204c7bc12

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