Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e1a96540a2e653…

MALICIOUS

PDF

71.1 KB Created: 2020-11-26 01:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 688e2861157137c534be56edbc2a3d66 SHA-1: 536b86327812e3e4ac33d68c0c5f344fea93e36d SHA-256: 13e1a96540a2e653ab98324c021a57f3528491cbdeb4b84a04be7e96fc3377a1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a potential link farm for SEO manipulation. One of the external URLs, 'https://traffset.ru/123?utm_term=stream+in+the+desert+online', is flagged as suspicious. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=stream+in+the+desert+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487194/normal_5fb83a74b9aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f998e8dafa9b.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/7484368.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/ff74ad19-bfa5-4bf2-8c39-42e9feb1e0de/91182241018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b415fb-ef51-436a-ac79-0b55b8fb9e59/the_new_interpreters_bible_volume_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab6b982-559d-4f2c-a34d-f5ae1d02c962/wuxawalop.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/xadobutuniserusepidego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1ebf05-15a5-4475-8257-0b0d275be80d/anti_terrorism_level_1_answers_post_test.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/kifonukomebifoxuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bdf946-1972-4fae-9708-8fa4a9c66b41/viscidus_guide_classic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d499bd1b-fcb6-4a29-b9bd-99d0b9db8eb5/55762619596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c2de63-5390-482f-aafb-b419ea30252a/ripot.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/wutajibuvewaret.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_off0000d90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90A 5168 bytes
SHA-256: 1b5472a747e534964181c13a3e52a97af1e05d73470bfb53fc357b5305d398c9
font_01_sfnt_off0000ea6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 10964 bytes
SHA-256: 537904c4067ada7332ee3ca9345d246401844f2beb98a0b5b8d71a3b76f78647

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