Malicious PDF — malware analysis report

Static analysis result for SHA-256 6143b944956dde05…

MALICIOUS

PDF

113.1 KB Created: 2021-02-27 21:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2185dcf153709f5e55db8d0b9b64e73a SHA-1: 210a2c547b30b5e85f4e6a1ad6ce77e77a7f507f SHA-256: 6143b944956dde05b4735c7c1dbb95728c8824bd6219be7915fe1f35006fc146
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links pointing to disposable domains, a common tactic for SEO manipulation or distributing malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL patterns are highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=what+are+the+books+of+poetry+in+the+old+testament PDF link annotation
    • http://toportt.online/86480283172kkiur.pdfIn PDF document text
    • https://lixavoje.weebly.com/uploads/1/3/0/9/130969842/wedulixifazibi.pdfIn PDF document text
    • http://topdouche.xyz/how_to_run_clean_cycle_on_frigidaire_affinity_washer36wiv.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/magotesaloguvoxe.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/d9b62cd.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/cEcVEDX/34973716199.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/sanupexis.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/pupifakivajanam_fogura_megivomumex_moderogupiji.pdfIn PDF document text
    • https://bibokesoxi.weebly.com/uploads/1/3/4/8/134850131/a8d5af0e4d069f9.pdfIn PDF document text
    • http://idealica-ordina.site/merchant_of_venice_workbook_answers_act_3_scene_2_icse_hubt05vv.pdfIn PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/5977458.pdfIn PDF document text
    • http://bestplacefor.rest/potewojurixoxuwegay0t7t.pdfIn PDF document text
    • http://italy-small.space/71374363514110ha.pdfIn PDF document text
    • http://supernefritroller.xyz/43745172666ml0wj.pdfIn PDF document text
    • http://copyrightproblem.com/sabokebuxaveaoea7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://danofef.rf.gd/92857217614.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E76 5600 bytes
SHA-256: b4cd313acd53f88208c37f8a378fbd1d36cde595070708c0b50851ffb24dc051
font_01_sfnt_off00019167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19167 11068 bytes
SHA-256: 2e510da4d51327a44ea7c58d11366af7c70dbf4270976b9be7a9f5c22ec5967c

Open this report in the interactive analyzer, or submit your own file for analysis.