Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee727e36a146789…

MALICIOUS

PDF

78.6 KB Created: 2021-03-04 09:26:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 95483edbe6854b4b85ff5e3fdd438cb0 SHA-1: 66516a295242d05a5fd7c48c5945be7793f7228c SHA-256: cee727e36a14678923e92f21d9108cb879e83ec20ce577fbc04be5641462938c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document's content, though partially obfuscated, hints at a lure related to driver's license renewal requirements to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/strik?utm_term=georgia+driver%2527s+license+renewal+requirements PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374853/normal_5fc8c104cde6a.pdfIn PDF document text
    • http://smeshnoykir.space/android_4._3_google_play_services_apkkp65m.pdfIn PDF document text
    • http://byseles.xyz/maxisys_ms906ts_pricenzzcp.pdfIn PDF document text
    • http://doorstepcomputers.com/nifagujawugilojejafanoz458lr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505125/normal_5ffa25098c26d.pdfIn PDF document text
    • http://all-system7.xyz/where_to_start_reading_spider_man_comicshtxi2.pdfIn PDF document text
    • https://cdn.sqhk.co/solaxutom/hgclpgd/98619542097.pdfIn PDF document text
    • https://cdn.sqhk.co/jobasalem/iagfgfR/city_racing_2018_3d_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/jbyRV2s/lugodenijijitazorimetolo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5fecc444954d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492892/normal_601674a359177.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/haAh3hy/game_dev_master_tycoon_story_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fd67c7fe7006.pdfIn PDF document text
    • https://sefomaxezaniv.weebly.com/uploads/1/3/1/4/131483109/gofusibiwuwifer.pdfIn PDF document text
    • https://wuxagukokixeg.weebly.com/uploads/1/3/5/3/135398542/bozesep_lebibowajan_jinusilosamo_zujetoresapodiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385636/normal_5fe4c85e14549.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxogafu/lIFjcSi/gazinibemubajipukizoxemad.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugituxi/Vjf2mjd/to_mars_and_beyond_cokesbury_vbs_music.pdfIn PDF document text
    • https://degubazof.weebly.com/uploads/1/3/5/3/135304991/b65d15.pdfIn PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/rurovuganepagufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 5604 bytes
SHA-256: 3fe1d4633c403a241884650fb71c143d717d6b620fc286d5628e6af953fef686
font_01_sfnt_off00010533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10533 12112 bytes
SHA-256: 23ca1cf974a0b1f896b6bbe9a4d8a0eb620b4fecd7e1866d3443d5e9be81ef2b

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