Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17c87963a304c42…

MALICIOUS

PDF

52.6 KB Created: 2020-11-22 00:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 21fd159136bc6951b230f7c07cd23349 SHA-1: 11e5445333defa6e394c66fd637c75e578d1f1f8 SHA-256: c17c87963a304c42c94b773538d00bd932e1999b53f181f0fce33cc823f2f59d
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to a suspicious domain ('traffine.ru') and another to an Amazon S3 bucket containing a PDF. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest an attempt to create a link farm for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9544

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/aws?utm_term=cooking+academy+apk+for+pc PDF link annotation
    • https://sigakoge.weebly.com/uploads/1/3/4/4/134437147/povigogine-fuwug-xoloduruzutov-datijujojuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_5fb38dc3cf016.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/gagagakigibapo/53354068599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a08d96-bcf0-4523-a34b-5ac77e609531/82899159559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dedea5c4-c68f-4451-b914-f853dde0291c/power_of_the_cross_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f32148-ae6a-48df-9ec6-26bb7f44a54a/58905589854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3756681-4359-4f1f-9749-c5da463d16db/86366182129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb4ab22-5565-4b64-b78b-af7599216dd7/i_like_me_by_nancy_carlson_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bef000b-ab1e-4904-8ab7-9756930c3985/60216903829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df37bbd9-ff24-4cb5-b7fe-06c75229e75c/wpf_4.5_unleashed_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e814e2a2-ad21-4e89-a475-8e9b2985342d/vileguroxozumajawulenek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba3bb060-a73e-4b95-bdd3-75350c43915b/50841712003.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/houston_rodeo_closed_2020.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB722 5160 bytes
SHA-256: f1287f5415b50e54a76e09b64c118ab27d60f4305ed3d9f11aed2613e0a9d5b5