Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d716076fdaf62a2…

MALICIOUS

PDF

64.4 KB Created: 2021-02-27 08:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 93fff98137b3bdcd39fb762a1a4db58e SHA-1: f31273192d6e3b0e6b2b060a7fefe73ec2916ea2 SHA-256: 2d716076fdaf62a278461fd11787dce4950e48c5609544725607492d64cae0ce
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=sony+str-k750p+specs PDF link annotation
    • https://biposekiz.weebly.com/uploads/1/3/5/3/135349949/7783921.pdfIn PDF document text
    • http://trackengine.host/vobafep38err.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_602e5c774e071.pdfIn PDF document text
    • http://maykistore.ru/11780892772hx2op.pdfIn PDF document text
    • https://lepebixetuvenal.weebly.com/uploads/1/3/4/6/134634058/buxixabokulab-kunojizomatum-tewosilegepuz-jesimawazos.pdfIn PDF document text
    • https://mawibunuxipu.weebly.com/uploads/1/3/4/6/134698869/997883.pdfIn PDF document text
    • https://rufogeror.weebly.com/uploads/1/3/4/6/134664275/135676.pdfIn PDF document text
    • http://goodik.fun/web_programming_step_by_step_download43gpi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446649/normal_5fd8221e96f04.pdfIn PDF document text
    • http://xozonline.ru/sony_ht-xt1_service_manualpgyq1.pdfIn PDF document text
    • https://darurirajilubi.weebly.com/uploads/1/3/4/3/134318819/432110.pdfIn PDF document text
    • https://lexebovet.weebly.com/uploads/1/3/4/6/134628591/f55eb9d132a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469135/normal_5fdd025aca857.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/taxikoxikikiniva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000be03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE03 5332 bytes
SHA-256: 336e8ac098737d088b898677e2ab7e71d18793b3a3bc54c719621ed294759b1b
font_01_sfnt_off0000d05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05B 10820 bytes
SHA-256: 7e30627835cf44f997e2aba4aa4446f9e8e64114f1a5988567aa933f31fb99e8

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