Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df097fdb6b693f5…

MALICIOUS

PDF

61.9 KB Created: 2020-11-22 15:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2d488feee823d4726476ab5caa8f4d70 SHA-1: 9235ef1d00ed19ca33f1b323d1b4144df009c087 SHA-256: 7df097fdb6b693f5f099c1f5dcdf6d580552c6d3f25eaaf108a3e17082a0c0d1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs points to 'traffine.ru', which is suspicious, while another points to a PDF hosted on AWS S3, potentially serving as a lure or part of the link farm. The document body is heavily obfuscated and appears to contain junk data, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/123?utm_term=you+made+me+so+very+happy+lyrics+alton+ellis PDF link annotation
    • https://mominebokax.weebly.com/uploads/1/3/4/8/134899741/8a9d270d3.pdfIn PDF document text
    • https://radelemetiwiwi.weebly.com/uploads/1/3/4/5/134520029/waponajet_jejexiferenav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f8b2120c33e8.pdfIn PDF document text
    • https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/barijuse.pdfIn PDF document text
    • https://laratenin.weebly.com/uploads/1/3/2/8/132816160/fojajikidadesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5f89352fd0a80.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/vipuxafol/marcelo_injury_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be649bc8-cf5d-4da7-92cd-e7ace7a4ae2f/lakakezerirax.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/31246538113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d4fa28-5ca6-4960-b0c6-9e72395d8dab/highway_pursuit_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5000cbd-8325-4a4b-bbfd-26264e8f82f5/piriformis_syndrome_foam_roller_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023f1464-3527-4b68-a785-8735e11af7eb/59467219834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76cfbcf-1cb6-4fd9-8df5-f80505377f3a/bmat_section_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/36449240477.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/web_banner_design_cost_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/9333172353.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_off0000b5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BB 5436 bytes
SHA-256: 52f94e4ae587aa08a25d80bec5f0338d1459954a2b1d9b7dcfc4211b339d2660
font_01_sfnt_off0000c81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81A 10024 bytes
SHA-256: 2ab4a5ab510df9f831b666c35ffada0729d8af6b74a84587b7b3fdc4fa6827d6

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