Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f0d52f9fceb921…

MALICIOUS

PDF

83.8 KB Created: 2021-05-16 11:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7984b8e065ff47970672587343e959fe SHA-1: 69c5a3cffe71e30309fe4045de08af4f20649d53 SHA-256: 64f0d52f9fceb92165e228a28f8c2797f1933e4eae9f8638165d15825d81e8e2
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://xezojetit.ru/strik?utm_term=what+kind+of+oil+for+black+max+generator PDF link annotation
    • http://top-odejda.com/4664751726xx61y.pdfIn PDF document text
    • http://voicebftyi.com/fufurujiferfyts.pdfIn PDF document text
    • https://durosokikiw.weebly.com/uploads/1/3/1/3/131379956/dibepuzarore-gurapune-sepatifuf-rowovekirifoze.pdfIn PDF document text
    • http://avtoshtorki.shop/the_fallout_sxsww647q.pdfIn PDF document text
    • https://gulawunobuxag.weebly.com/uploads/1/3/4/6/134627092/bepawuti.pdfIn PDF document text
    • http://lg-supportteam.com/ti30xa_calculator_onlineehzzf.pdfIn PDF document text
    • http://sreview.online/caller_ringtone_in_tamilifzzo.pdfIn PDF document text
    • http://varnisvakq.ru/el_nombre_de_la_rosa_pelicula_onlineo4313.pdfIn PDF document text
    • http://rating-bookmaker.ru/interesting_boy_names_starting_with_kgbh0u.pdfIn PDF document text
    • http://mediaverifiedbadge.com/applied_science_freekaicr.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/7645575.pdfIn PDF document text
    • http://eduha.online/charity_commission_annual_report_guidelinesj200n.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_6adb60271e424e07a0f431e533b6e1d3.pdf?index=trueIn PDF document text
    • https://8a83ad47-1dc6-4e38-b726-138de0fe4a7e.filesusr.com/ugd/043c68_f23cf14197da4713929fd5054d200e69.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f01132d-dbf2-4e68-8c91-d0b50486bce2/10736666774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c697036e-82cb-44ba-aa73-8d051aff816b/do_spotted_lanternflies_have_any_natural_predators.pdfIn PDF document text
    • https://144b3c48-dbd6-4e21-8f9c-4b0d4c5c240d.filesusr.com/ugd/bae363_064a1580d15a437bba92fbe7615a58b8.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_e6bb2105b07f4d12987d186bc8eabac9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83fd48b-8233-4faa-a2df-d4b6da4e601c/gedazafizabiw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 1724 bytes
SHA-256: c99608701a7306fb1f16c1958c28c4a84e59378028c34788f79fa0e1f4c540c0
font_01_sfnt_off0000fa0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 5332 bytes
SHA-256: 5a8ec8c061d72407b04cb8fc72e1eef3e618eb20202bc0e83b11194141f1aa9b
font_02_sfnt_off00010c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C05 10896 bytes
SHA-256: 59bc15f574f0b7f8c108bd3f3fb026b90b9338267579c49bbdc3b92237b767fb
font_03_sfnt_off0001316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c