Malicious PDF — malware analysis report

Static analysis result for SHA-256 37968405e98925ac…

MALICIOUS

PDF

84.5 KB Created: 2021-03-10 20:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb707ba5b69c0f5a86b70a8abde24262 SHA-1: e65ef2cace909b797fb830fd5d7d2197f8a6ac12 SHA-256: 37968405e98925ac849206218cf36c1a103acb8760e22f5851b3a9d03adb3cee
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to manipulate search engine results. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://resalured.ru/wix?keyword=severn+bridge+toll
    • http://podeves.xyz/lizedefopomuly480.pdf
    • https://pewatusikowago.weebly.com/uploads/1/3/2/6/132683224/jokudenazusuturo.pdf
    • https://rakiletapaleta.weebly.com/uploads/1/3/1/8/131856645/lotija-buxabizaxixolo-gabukukew-zasuw.pdf
    • http://xenavowi.22web.org/nupipivugenokudi.pdf
    • http://doweryklkq.space/lotus_car_logo_pngy6uqj.pdf
    • http://vemexulitoko.iblogger.org/icom_746_pro_service_manual.pdf
    • https://mitigifagoted.weebly.com/uploads/1/3/5/3/135325532/98777.pdf
    • https://gikositaga.weebly.com/uploads/1/3/4/7/134773380/4312131.pdf
    • https://nujodobenume.weebly.com/uploads/1/3/4/4/134441993/lugegisodoji.pdf
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/85e94352a30c.pdf
    • https://jekunido.weebly.com/uploads/1/3/4/3/134312583/fapowimewilapuga.pdf
    • https://jironomazubem.weebly.com/uploads/1/3/5/3/135393756/woxazadunajizojufafi.pdf
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/5099582.pdf
    • https://dobabolomibela.weebly.com/uploads/1/3/2/6/132681713/pukosi-diwejexan-kiwumuju-xuzok.pdf
    • http://doordash.link/cyrano_de_bergerac_movie_quotesj2t7y.pdf
    • http://sayseedokg.com/winazevulukendgnc.pdf
    • http://rocketdocs.us/2351384629otpyy.pdf
    • https://wanuvimuz.weebly.com/uploads/1/3/4/4/134462356/9839cd4a1f3.pdf
    • http://prequester.online/aqualink_rs8_upgradegwnoy.pdf
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/vibiduxamuzezar.pdf
    • https://rigagebefizo.weebly.com/uploads/1/3/4/6/134631069/960604.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://loluwoje.epizy.com/1697777591.pdf
    • http://sarajemewowin.rf.gd/pioneer_deh-80prs_manual.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_off0001107e.bin
94de540835c2dfde87dbd844f4e8dc12c95ea423574db45847eb5eb3229e1bc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1107E 4908 bytes
font_01_sfnt_off00012146.bin
a1ce22c6bfb96688784e2585817d117a960a97b22cff614ca2b45de35248ed82
pdf-font-stream PDF embedded font (sfnt) at offset 0x12146 10460 bytes