Malicious PDF — malware analysis report

Static analysis result for SHA-256 267b14f08942a680…

MALICIOUS

PDF

79.2 KB Created: 2020-12-21 19:38:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7351eddc2ee20b28efa39d53f22b4ed6 SHA-1: d88d005671a23315f0cd7f9ab7d63d4086511978 SHA-256: 267b14f08942a6807d808db93312d6a4031fda48e95547bfa2895858daa17723
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, characteristic of a link farm designed to manipulate search engine results or redirect users to malicious sites. The primary URL, https://traffking.ru/aws?utm_term=marketing+plan+template+slideshare, suggests a phishing or scam attempt disguised as a marketing resource. ClamAV and ML classifiers confirm the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=marketing+plan+template+slideshare
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/3074982.pdf
    • https://cdn-cms.f-static.net/uploads/4413012/normal_5f993e69640d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8c8d7c0e-6d51-4d0c-acc2-0e98dea8753b/nanapunuduxa.pdf
    • https://static1.squarespace.com/static/5fc5bd09a5bc066edfc6a90b/t/5fc6b6c856cd4459b39f5820/1606858441191/begejudowesakokusum.pdf
    • https://uploads.strikinglycdn.com/files/cc334735-237a-4f77-9cf4-489d8f1f25ac/nibuwila.pdf
    • https://s3.amazonaws.com/negonanopix/vevagalatora.pdf
    • https://s3.amazonaws.com/ritoma/fusiform_bacilli_diseases.pdf
    • https://s3.amazonaws.com/dinigugaxej/true_way_asl_workbook_answers_unit_3.pdf
    • https://s3.amazonaws.com/tipikaxe/sorting_fruits_and_vegetables_worksheet.pdf
    • https://s3.amazonaws.com/matogapibelifiv/bifenidogotef.pdf
    • https://s3.amazonaws.com/nitidadufetenu/mopewotadazogedijup.pdf
    • https://s3.amazonaws.com/pavujiniz/gooners_guide_betting_tips.pdf
    • https://s3.amazonaws.com/zirojopemup/circular_motion_problems_worksheet_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8c0.bin
f0044946e892b4f10d9b7e00623d4dd06a3cd005b0347ba9ca4628c46fe295a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 5444 bytes
font_01_sfnt_off00010b2a.bin
466d41248579e5234200559b5d58e061f3296116c5e3859829fa686ad43a7136
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2A 10808 bytes