Malicious PDF — malware analysis report

Static analysis result for SHA-256 96deb654dabad84b…

MALICIOUS

PDF

83.7 KB Created: 2021-04-22 12:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd75ff40c06e33a8e54bbe95175db473 SHA-1: e3653123faf9f2223d84478f2adc9eea4f491fd1 SHA-256: 96deb654dabad84b3f62b5ff4d0d2193623cba750501c7e378993b46e37e8b93
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, with one pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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://xezojetit.ru/strik?utm_term=what+is+the+main+purpose+of+psychology
    • https://tanoviruxejalun.weebly.com/uploads/1/3/0/7/130775892/bulet.pdf
    • http://pililiriniru.mypressonline.com/adjective_and_adverb_phrase_worksheet.pdf
    • https://cdn-cms.f-static.net/uploads/4457849/normal_60280843a9e2f.pdf
    • http://rowomonug.mywebcommunity.org/masubarepavozu.pdf
    • http://zugapuvu.mywebcommunity.org/access_6_workbook_lsungen.pdf
    • https://cdn-cms.f-static.net/uploads/4416805/normal_60644f33ef6fc.pdf
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/282742.pdf
    • https://didaripetog.weebly.com/uploads/1/3/4/6/134685212/kotaminozoxojunem.pdf
    • http://nonretloli.site/62585132802jwyeh.pdf
    • http://mebel-albero.ru/serato_dj_for_dummiesxx7je.pdf
    • http://zowogusatutojus.mywebcommunity.org/bricks_listening_beginner_1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fonibinaraj/dubotug.pdf
    • https://s3.amazonaws.com/wifukedot/soputoridu.pdf
    • http://fiforeru.atwebpages.com/calendario_liga_portuguesa_2020_20.pdf
    • https://s3.amazonaws.com/rakabexozu/nefoloja.pdf
    • http://jokajejuti.atwebpages.com/laryngeal_mask_airway.pdf
    • https://s3.amazonaws.com/takateg/alphabet_cursive_writing_free.pdf
    • https://s3.amazonaws.com/rorives/kegotoxizatida.pdf
    • http://wugerubuvugox.myartsonline.com/97597729496.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_off00010a27.bin
866e450050ead094d6f40c22606bdbef9cf9048b0eb389d0917323b1f24b4d21
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A27 5544 bytes
font_01_sfnt_off00011ced.bin
eb615da0fcd9c3665c8f171a56e0dbf7deb33ee6c7138eb726aa5c3bdbbdd0d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CED 11004 bytes