Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef472e551e8e37e…

MALICIOUS

PDF

35.8 KB Created: 2020-11-05 03:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5134725e18e21e6f3aaa17f8fbbda981 SHA-1: 442cfde486f9838e6cb53d2178d57288b57fa3de SHA-256: 6ef472e551e8e37ea9d4b1cd3825dbae1335864be6d9fd1eac567aaa94061254
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?keyword=apk+mod+android+1'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs suggest an attempt to lure the user to download or interact with malicious content, likely related to 'apk mod android 1'.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/123?keyword=apk+mod+android+1 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fa1a985f0bc2.pdfIn PDF document text
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/d1d971acf78.pdfIn PDF document text
    • https://xavupavise.weebly.com/uploads/1/3/4/5/134584264/kevibemenojon_fikapumaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f89daaa31ab6.pdfIn PDF document text
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/67089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5f9b2b62726bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f8e23ed232f9.pdfIn PDF document text
    • https://ferowadamo.weebly.com/uploads/1/3/4/5/134593689/misiwuzure.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/gedimuta/barometer_rising.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b731e83-ffee-4e1d-bb84-e81ec488c6ff/advantages_of_google_pay.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/android_xbmc_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/california_lease_agreement_fillable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ccbd2ba-3af2-48eb-b2e2-586846fc074f/bunker_hill_security_digital_executive_safe.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/le_pass_compos_avec_tre_et_avoir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1247001e-d608-4768-aaa2-ea8b74bc0a83/95891682015.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/litiwubebogilud.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_off00004edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EDD 5000 bytes
SHA-256: fb1500013b9274ba24e107be91c8d81fa624f006690ad1de50210bff46cecb16
font_01_sfnt_off00005fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 10372 bytes
SHA-256: cc6cfd55075d6689d1e1df402dfacf849c52a2c57310a54b6683e6800a35c9b6

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