Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbeacf961fd61e32…

MALICIOUS

PDF

82.3 KB Created: 2021-06-11 18:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c2770eae7d8578297d31cdf7c49096c3 SHA-1: f15576530a3b5ff01ec83cbe839dc794fd50e844 SHA-256: bbeacf961fd61e32bca79026685faa53c51eb28631079fd45890477d1850752f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://archism.ru/pbw?utm_term=xlsm+to+pdf+converter+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495841/normal_603ce24c2e948.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5ff4dde29b24c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_60b97567a5260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506131/normal_6035e30490d53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_6037efcc7c93e.pdfIn PDF document text
    • https://togasiwivote.weebly.com/uploads/1/3/4/3/134370981/bereroxerif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501041/normal_5fe74cda40710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_6061c2b587a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467927/normal_60bb938a3ade4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393515/normal_5fe4fac72525f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475382/normal_5ff0f0d73f02f.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/19fccaa9265d7.pdfIn PDF document text
    • https://jibametugo.weebly.com/uploads/1/3/4/4/134486067/bifutiga_mapofiv_fogexasul_jutepovodalije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471512/normal_601d6c344499d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nugewus.pbworks.com/f/harley_davidson_tri-glide_ultra_trike.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/f/naxik.pdfIn PDF document text
    • http://jujupaw.pbworks.com/f/envision_math_grade_6.pdfIn PDF document text
    • http://gosirata.pbworks.com/w/file/fetch/144443472/watch_hunger_games_mockingjay_-_part_1_online_free_-_123movies.pdfIn PDF document text
    • http://xereledo.pbworks.com/w/file/fetch/144803142/la_familia_spanish_worksheet_answers.pdfIn PDF document text
    • http://jabodawo.pbworks.com/f/brainly_hack_mod_apk_unlimited_points.pdfIn PDF document text
    • http://tanoroxamo.pbworks.com/w/file/fetch/144979773/42236823380.pdfIn PDF document text
    • http://fixiguru.pbworks.com/w/file/fetch/144436431/72983958421.pdfIn PDF document text
    • http://lakejidumap.pbworks.com/w/file/fetch/144989718/sutetuzewidibomutarunobik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE587 9448 bytes
SHA-256: 62bbd010fd2f8bb2ff772c5aae529df538444832fe7fcac4fbff473768c7d8d4
font_01_sfnt_off00010435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10435 5128 bytes
SHA-256: c938d28a695ab5187e274d46fe2d90d88d32737675032330c66ae5abbb813bd1
font_02_sfnt_off0001159b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159B 11220 bytes
SHA-256: f24c8301e7ba323ba527e68a302b721d1dfe8c1611c919783261e12fbc71861c