Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed79b6a38027493d…

MALICIOUS

PDF

129.4 KB Created: 2020-12-20 16:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 23461dbd3c59e30e5de8b1e1f94c223b SHA-1: e715cbf44a3442b9df8883edb93d6a7422dd2812 SHA-256: ed79b6a38027493d8d924dfbe998d04bc619bd94f2ec7a6d213aff9fbc29848f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a large number of external links, with one suspicious URL pointing to 'trafffi.ru', suggesting a link farm or redirection mechanism. The document body is heavily obfuscated, but the presence of external links and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially harmful content.

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://trafffi.ru/123?utm_term=knights+of+the+round PDF link annotation
    • https://limikasideg.weebly.com/uploads/1/3/4/4/134446439/tagorug.pdfIn PDF document text
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/1684001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477878/normal_5fbee3857efbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5fda8e4787d54.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/5333602.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/96c22584-9040-4659-a7bd-0d4078a1c4de/why_do_rocks_have_different_colors.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/uss_hoel_ddg_13_agent_orange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac249ef-356c-4b34-8f89-192131df4189/80709604230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bb3ced-9e72-4bb9-a75d-54e0d0de1f9d/figurative_language_quiz_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12ea51a-f15c-440e-8de6-50257a3d2f48/history_alive_8th_grade_answer_key_chapter_23.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f722d9-7bad-4a45-bdfa-a0707d266be8/15998226231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9edc4e-580e-4728-a9a7-66f5251a6382/23670544804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a141d9f-bc0a-4534-b740-2a9dbb25e03c/nesters_microbiology_a_human_perspe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e1068b-6c13-4fe9-b2c5-6d7de2b5445b/22013654952.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/1079905086.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B268 3764 bytes
SHA-256: 6013719eb4eb619b4942bf2ec793cc7c8628cf195771dcb49d0e61ddad624442
font_01_sfnt_off0001bfce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFCE 4896 bytes
SHA-256: cbc6ec372a486d04e9e48672f6d7f00f8c59f7854a84ac88e452cebf3118ef40
font_02_sfnt_off0001d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D07F 11344 bytes
SHA-256: 7d3fc85e67f635d5d4f2770e32d9583b37e3eae466ed594c36d6845e4b85f004

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