Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e30b08983736ba…

MALICIOUS

PDF

72.2 KB Created: 2020-12-28 16:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9b189bdca13167fc3ff6ecfb2df98fdf SHA-1: ca3aba91c7e400ba254aa55940385e3140d79ba0 SHA-256: 33e30b08983736babc903b0470a39165de1856cf128c18869aac21df75c4777c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary URL being traffset.ru, suggesting a phishing or content-farming operation. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, many of which are hosted on Weebly, pointing towards a coordinated effort to distribute malicious or low-quality content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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=anunnaki+pdf+download PDF link annotation
    • https://kamenibez.weebly.com/uploads/1/3/4/7/134727972/vonototil.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/i6Bic5c/disney_plus_premier_access_cost_uk.pdfIn PDF document text
    • https://ruvetuse.weebly.com/uploads/1/3/4/6/134618438/4877980.pdfIn PDF document text
    • https://mixidesurujof.weebly.com/uploads/1/3/4/9/134902607/xukad-gadolik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420927/normal_5f980481a10cc.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/vuvaxulogi.pdfIn PDF document text
    • https://fisofomopix.weebly.com/uploads/1/3/4/6/134603918/9851492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450045/normal_5fbf0c5f89ae2.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/xufaxoferugod/boise_id_garth_brooks_ticket_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f14f191-574b-456f-8605-1d23b6ea494e/types_of_flying_lemurs.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/janoniruguka.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/asphalt_permanent_deformation_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9a469c-69f2-47f0-8847-34fce2b2917b/12882824524.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/55188607190.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_off0000de79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE79 4904 bytes
SHA-256: 861023595b4799ac37db5cae8290d58431686fe8dfbf3ec9d62e680f45be792f
font_01_sfnt_off0000ef5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 10840 bytes
SHA-256: 298d6d0c1361e2919bb1009292c68ac7d4f80782f8d45b5b54396b1d5587319e

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