Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1feca062bb36f5a…

MALICIOUS

PDF

70.3 KB Created: 2020-11-21 11:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 388c549c000afc500746d0da33090e18 SHA-1: ea6fd0043c49d1e2fed055a70ac41a0150218acc SHA-256: d1feca062bb36f5a3af129f9c922ad165dbefbd58009ce05135594d9c51343aa
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, including one to 'trafficel.ru', suggesting an attempt to redirect users to potentially harmful content. The document's structure and embedded links indicate a probable phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=7th+grade+podcasts PDF link annotation
    • https://kafutejitiripil.weebly.com/uploads/1/3/4/6/134625984/xaterobatuzamer_diwukuge_xifubirab_fomutimubaruver.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/6601745.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/9324627.pdfIn PDF document text
    • https://fakoronad.weebly.com/uploads/1/3/4/7/134712901/8c605d7113eb.pdfIn PDF document text
    • https://neburaguvud.weebly.com/uploads/1/3/4/4/134477844/bixog.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/3502199.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/975674691.pdfIn PDF document text
    • https://renalulawe.weebly.com/uploads/1/3/4/7/134735886/rajudupifu.pdfIn PDF document text
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/466341.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/e83937f2-c286-4ebb-99b3-40dc8dd21fd1/modomolologap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca029b1-dcec-4c08-8255-d00a517d4c09/99695949814.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/alcohol_consumption_questionnaire_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c55cf3-90cb-4890-9f31-00bb024ed752/koxanoxivaripud.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/popular_medieval_names_for_men.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0b46e45-9b6e-4fb5-8f74-8fcd71e07afd/pofumixodifuxuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377722f0-faa3-4eaa-b248-f50dad6447b3/adobe_acrobat_pro_apk_cracked.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_off0000d649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD649 5288 bytes
SHA-256: a8b49146e1daf884770a9746735ea0d4155dae81523cdb0b86626317787e40f2
font_01_sfnt_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 10592 bytes
SHA-256: ced8686cbbb0c73ccef2a90f9afb9478fb7c422eb5813e051b2b212b40fefcd1

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