Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c61266993442e5…

MALICIOUS

PDF

74.5 KB Created: 2021-02-16 10:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f99363fdfb9eb7dff3ee1568f0e628fa SHA-1: 28eaca853e31c6bc2d3baea1ca0b61291cb28acc SHA-256: c6c61266993442e5be6f66676317f3139b1bf11f6cf64cb32f2a4bb22a56117b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to link farms, suggesting a phishing or malware distribution campaign. The heuristic PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS firings strongly indicate malicious intent. The embedded URL and the document body's suggestive title are likely lures to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=what+does+it+mean+when+a+man+ejaculate+a+lot
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/56f321238871f.pdf
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5fd7d5f8c324b.pdf
    • https://bazitakitavame.weebly.com/uploads/1/3/5/3/135394276/lotivu_jelipenabibuti.pdf
    • https://cdn.sqhk.co/movumatoz/gfhjggc/rededaxafojifep.pdf
    • https://cdn-cms.f-static.net/uploads/4386333/normal_6026200bbd4f3.pdf
    • https://bofujobepoj.weebly.com/uploads/1/3/1/1/131164048/volagivevute.pdf
    • https://static.s123-cdn-static.com/uploads/4486965/normal_5fccd1f0e8f46.pdf
    • https://cdn.sqhk.co/xegogeji/ZhtOiip/bumabarojuwovewaduru.pdf
    • https://kemavejikokawi.weebly.com/uploads/1/3/2/3/132303077/danukejedakipoxoziz.pdf
    • https://cdn.sqhk.co/xeduwukaxusa/Pi4ighb/76924603880.pdf
    • https://nupafosudivoz.weebly.com/uploads/1/3/2/6/132682156/nadezas_muxix_fetug.pdf
    • https://sedivunoruset.weebly.com/uploads/1/3/4/8/134859312/72eb57c17.pdf
    • https://werakemil.weebly.com/uploads/1/3/5/9/135973214/pimawitenilufuk.pdf
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/6939525.pdf
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/9d12f36017b38.pdf
    • https://cdn.sqhk.co/wepunajexiju/mzyijid/23747279846.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tugumeb/lajubibugutakina.pdf
    • https://s3.amazonaws.com/fadupazageraf/madotuxopilosowamebexutof.pdf
    • https://s3.amazonaws.com/baxadelefofibuz/solvents_that_form_azeotropes_with_water.pdf
    • https://s3.amazonaws.com/wetevali/piano_chords_songs_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f5.bin
5f14a4290d9b97b54f12463bfe6d978c633faaf013f2c88426ef46fbba82cec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F5 5264 bytes
font_01_sfnt_off0000f8d2.bin
0de60573ee22903f0af065189bdb9942dde06d9e4dd2ad5572f69da94f98af93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D2 10416 bytes

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