Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2c1e6d9a9efcc6…

MALICIOUS

PDF

74.2 KB Created: 2020-12-25 01:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b3e557b0afe85729680b7aee8b46a87a SHA-1: 907102c992072894d106e807f8a2d3593eae8b53 SHA-256: 0a2c1e6d9a9efcc624f2ed56261b7ae4868ad07fd2621dbd8e5c06604af8ce17
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged as a link farm. The document body, though heavily obfuscated, suggests a lure related to 'late rent payment letter template'. The presence of multiple external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafficel.ru/aws?utm_term=late+rent+payment+letter+template PDF link annotation
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/wozumadaku-mukevewurovebu-nefebo.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/4608468.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/xowetekewe-serepuseruxelit-mawadisaviwa-lawepufudo.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/Ihfy67v/guilty_conscience_meaning.pdfIn PDF document text
    • https://zupavuzinopaz.weebly.com/uploads/1/3/4/2/134265708/misefupuferefob-bikojo-jinediwul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5fc9cbe02366b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f970573465fd.pdfIn PDF document text
    • https://poperetaro.weebly.com/uploads/1/3/4/8/134893078/1db6abae.pdfIn 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://s3.amazonaws.com/jumedemimo/tuzowaradixawujafebeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69ec1907-70d3-47fe-981b-773753236d12/gegurunavoferu.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/xefolikezibojavomaxoroze.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7E 4460 bytes
SHA-256: e3e35791ec68053377f05af5d90919199d1ec070dd5d17cad8f88fbb344c8851
font_01_sfnt_off0000eb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 10188 bytes
SHA-256: ce0c937a6d32934aa2ac1e983e977bd10a676e191fcb67dba067f4ef0dbb56aa
font_02_sfnt_off00010dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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