Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ab7c1c7d9e8395…

MALICIOUS

PDF

76.5 KB Created: 2021-05-02 07:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a3b131391aff8609d3e11d1f8aba9b8f SHA-1: 5ca851409635a734c3d39d3a0950e263f1271a7a SHA-256: 01ab7c1c7d9e83955f248ee055a053b77660f560353ab9abaf2415bcb662beca
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many of which are on disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of the 'utm_term' parameter in one of the URLs indicates a tracking mechanism, common in phishing or scam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=evinrude+25+hp+outboard+for+sale PDF link annotation
    • https://pemowazazafal.weebly.com/uploads/1/3/5/3/135385959/5848960.pdfIn PDF document text
    • http://makeyourself.xyz/manulife_new_logo93z47.pdfIn PDF document text
    • http://doorstepcomputers.com/kudogi6ob4.pdfIn PDF document text
    • http://bioforcecolumbia.site/77187564997agv0x.pdfIn PDF document text
    • http://centerbluebadge.com/498784731638krcg.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/8156041.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/e893c0d299.pdfIn PDF document text
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/pulonoxoput.pdfIn PDF document text
    • http://nubiviw.22web.org/apprendre__programmer_en_python_openclassroom.pdfIn PDF document text
    • http://gouliwer.online/5575664952hmopi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd2b2ad-5d59-47d0-b6f1-ee841835449a/18411662440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09bcc01f-ec28-408f-935c-777f56d47686/sub_zero_fridge_freezer_prices_uk.pdfIn PDF document text
    • http://tixogakimu.epizy.com/nilutodifal.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_0d98b8bca52245da90826f29f30efe6f.pdf?index=trueIn PDF document text
    • http://raluxubitemuvot.rf.gd/adobe_writer_pro.pdfIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_09460347e3804d06b96125857f886253.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8d9ea7-7c15-4027-8740-ca2137a58289/78511635328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dea570d-b1a6-4285-8408-8de61799846e/applied_linear_algebra_4th_edition_slader.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_283f18bb513b4fd895170f03117d72a6.pdf?index=trueIn PDF document text
    • http://sugorotebego.epizy.com/60581379044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94d31d2-7b9a-4105-bded-5053b6fd8c13/buberawitomi.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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5544 bytes
SHA-256: b41f2bded6c8afb243a4bbce4310fd14f8dfa309f1aeaeda15c87b5f2786da39
font_01_sfnt_off0000fe60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE60 11308 bytes
SHA-256: 7886808bcedfaf35e9cf71aae73ac7995f87a46eb8001182948a6c41abc6d8dc