Malicious PDF — malware analysis report

Static analysis result for SHA-256 2344d67a09f087c5…

MALICIOUS

PDF

87.0 KB Created: 2021-04-04 18:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0344b617669c343d2f87dc9e8bb8018c SHA-1: e9cfa29b447077beba35959d1ba000c4bc683a81 SHA-256: 2344d67a09f087c547bb4e6eaad8aaf0c9b80b0498ca9676437bf0eb568dbaa9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed for SEO manipulation or to distribute malicious content. The embedded URLs and the overall structure indicate a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://dugedepap.ru/123?utm_term=best+manual+espresso+machine+under+300 PDF link annotation
    • https://dabemevabun.weebly.com/uploads/1/3/4/4/134476179/2e83ed42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_602a7c5027128.pdfIn PDF document text
    • https://jepunitapo.weebly.com/uploads/1/3/1/0/131070437/fimiduvezawavu_tazaxibes_fitikolo.pdfIn PDF document text
    • https://cdn.sqhk.co/nemanive/vExge09/92217721408.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/jumeviduxikori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_6013bf2b3380f.pdfIn PDF document text
    • http://buxodubofazaki.iblogger.org/95903153806.pdfIn PDF document text
    • https://cdn.sqhk.co/supetudoti/hjgijij/83605815321.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/jhvYcad/jozitidala.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/206ba7f29f82377.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/tigavezisatiti.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/rupikenumejarabif.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/igftOic/modern_digital_marketing_techniques.pdfIn PDF document text
    • http://woperevolowe.22web.org/47019597539.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/wijenebopedepif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fffd2ee0dd56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_6044f9647e1cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d429d46a-6203-486b-8c9d-ede5597e1383.filesusr.com/ugd/419b00_9b36bc094df240749b89c3b474038143.pdf?index=trueIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/97130444930.pdfIn PDF document text
    • http://walefusariwe.epizy.com/voxewigovoviburiwiv.pdfIn PDF document text
    • http://kiwuvapinemugi.rf.gd/imperative_form_worksheet.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/zujesesasexoxogobixap.pdfIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_f9532735adcf4c22b852eb5f0bd31197.pdf?index=trueIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_2dd67026b57f43fb95d83078c889be71.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 5668 bytes
SHA-256: e54c9f770ef32f4ca8b144d5bab18593745828534d4a63540d8807e8e7e579a2
font_01_sfnt_off00011298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11298 11032 bytes
SHA-256: 57ae88f96aca5ae17a885d1da596a555fa6d430ab19f742f753b6caec33e5b29
font_02_sfnt_off000137ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137EF 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7