Malicious PDF — malware analysis report

Static analysis result for SHA-256 335bc2aee233c976…

MALICIOUS

PDF

66.9 KB Created: 2020-11-22 07:31:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b0d52c925e863790c8243853add2c486 SHA-1: 7ccb6089d99d0ded72feab4145739e70775302dc SHA-256: 335bc2aee233c976c1b2cf42fc6532542e818dc1ccace5ae0feb004dbe946cb5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The primary URL, 'https://trafffe.ru/123?utm_term=que+figuras+geometricas+estudia+la+geometria+analitica', appears to be a lure for search engine traffic. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly indicate a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffe.ru/123?utm_term=que+figuras+geometricas+estudia+la+geometria+analitica PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f902f21b9111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5fb6da94d2b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f8f70db8a5b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_5fad4dfc839c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5fabc7f92619a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_5fb4248d3834b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465264/normal_5fb7ff4bcdaef.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/saselixu_turejokofafip.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/ed4401b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f88de4ed3343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f8ee68e4a584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/fonasanuvozijivovigaki.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/sweet_chiming_bells_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/personal_fitness_merit_badge_worksheet_answer.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_off0000c5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F5 5400 bytes
SHA-256: 12fe3e35bb51ff10de2c1ec20d1ff03ac260f25a065298996516024d3e80ade1
font_01_sfnt_off0000d840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD840 11188 bytes
SHA-256: 6c38b779e59d5371e3ccf9a20db1c172b61dc4e54d0f67c3f835a0e12d8ff5ba

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