Malicious PDF — malware analysis report

Static analysis result for SHA-256 6966f43675393fb1…

MALICIOUS

PDF

82.6 KB Created: 2021-05-15 20:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64f44e44e261264f4dd772b6b4593870 SHA-1: 75082b58258c06814da3c27446d8749268621c71 SHA-256: 6966f43675393fb189f9d11708458d8aa013368405b6f7465a618e31f177e95d
156 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 or trojan threat. It contains a large number of external links, suggesting a link farm or phishing attempt to redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated content, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=poetas+en+lengua+ind%25C3%25ADgena
    • http://cybety.xyz/how_much_hp_can_a_stock_2010_camaro_ss_handlegsu3o.pdf
    • https://cdn-cms.f-static.net/uploads/4416495/normal_601d946e48d87.pdf
    • https://cdn-cms.f-static.net/uploads/4478664/normal_6036fc188731a.pdf
    • https://cdn-cms.f-static.net/uploads/4371023/normal_602900130b970.pdf
    • http://3203epworthcres.com/jotul_f_602_specsvj49p.pdf
    • https://cdn-cms.f-static.net/uploads/4387567/normal_603b2959c25f7.pdf
    • https://cdn-cms.f-static.net/uploads/4421330/normal_6014fa90836de.pdf
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5ff3d8c5e0b34.pdf
    • https://static.s123-cdn-static.com/uploads/4418383/normal_5ff3b604ccdb6.pdf
    • http://nabavawuzafurur.mygamesonline.org/how_much_do_reiki_practitioners_make_canada.pdf
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fd654e568c4a.pdf
    • http://rexevivejegox.scienceontheweb.net/juzimiwoturone.pdf
    • http://rajeziriga.scienceontheweb.net/marketing_strategy_of_apple_iphone.pdf
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5fcef3f545b0f.pdf
    • http://momentshop.space/arendelle_castle_surprise_feature_playset_instructionspltfx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_fe518351ab5d441fa454885021507994.pdf?index=true
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_b1951b2ae2e64e298930dca894f5a470.pdf?index=true
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_53f43053613345e3a7a2ca4631f8e07b.pdf?index=true
    • http://metiguwuwezaza.atwebpages.com/botrytis_cinerea_control.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f62d.bin
2ca359a2cbb61ba7e289d7f8d53f191be9d8b1b2ec36350ca22392330fb0a26e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 4832 bytes
font_01_sfnt_off000106a4.bin
833e85db1ef67ac081337faa5f1a5418d48d63a35a7ee358973c6be60a636b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 12088 bytes
font_02_sfnt_off00012d75.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D75 4324 bytes

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