Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14efa62cf19ae82…

MALICIOUS

PDF

70.4 KB Created: 2021-06-02 08:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b8073f4165753eed201933a20c87a4ce SHA-1: ed2ba3ce7bcd4cbb254bb0437f882bc731484bb5 SHA-256: a14efa62cf19ae82f64d5575b5bac43c212a10efe22d0f22d280a28550489c42
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'fokemale.ru', which is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains text related to a song search, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/123?utm_term=chehra+masoom+song++mp4 PDF link annotation
    • https://tadafemuge.weebly.com/uploads/1/3/4/4/134480681/xiduwirobunapafes.pdfIn PDF document text
    • https://lajidusok.weebly.com/uploads/1/3/1/0/131070852/d2993afad.pdfIn PDF document text
    • https://livorenofog.weebly.com/uploads/1/3/1/1/131163774/eddc48.pdfIn PDF document text
    • https://dakezevowefop.weebly.com/uploads/1/3/6/0/136088489/6415940.pdfIn PDF document text
    • https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/1135418.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/ce24e7e6-4e79-464f-aa50-d445e70921a8/fewoxopinukutitirovegog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e480d322-24a7-42ae-8bc9-d24ecc25eb0a/necchi_sewing_machine_guide.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144421554/37887566855.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/how_to_write_a_professional_reference_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74521619-9d74-4cbc-a2c8-a72f0f5eb9a2/kujituxaxan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f33133f-3634-47a6-81db-4adcdece58a3/gofimixoxukuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87ae5ba-73df-4a26-9945-e928f3c0aa06/zabezubexarax.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144483444/how_to_kinesio_tape_for_pregnancy.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144413817/zuwedefizob.pdfIn PDF document text
    • http://rasovuxosew.pbworks.com/f/how_to_build_circuits_in_tinkercad.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144485613/51146365724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1816f56e-52de-47e6-9136-5936fedf4b41/navirulo.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/w/file/fetch/144490200/60624538162.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144421242/castles_and_crusades_players_handbook.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_off0000d6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AC 5192 bytes
SHA-256: a4832f8ce355bd44fa520cbd7ea0e118033cc4f7e289d0a8641a036bfcbc9b26
font_01_sfnt_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 10804 bytes
SHA-256: 087159b9a24fb37d4232115d6367d8c5160a3c497d42a6bc644c07f060c7746f

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