Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b5f780096f160e…

MALICIOUS

PDF

89.6 KB Created: 2021-03-24 23:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: dcfee2d1bce13a86ec126b7e1c594e21 SHA-1: 53b4dc653d1a0a8e36edc668e2f9553d5b0a4771 SHA-256: 15b5f780096f160e2f565f9ed3261f39a7b645932d09643569f788dddddd12e8
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'ponafet.ru', which is suspicious. While no scripts were directly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to potentially malicious or deceptive content, aligning with phishing or SEO abuse tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ponafet.ru/wix?keyword=naruto+genjutsu+world PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382407/normal_603e485a30baa.pdfIn PDF document text
    • https://zuzuxaze.weebly.com/uploads/1/3/4/0/134040629/cb0d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fce673caf3e2.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/pulozavuvuf-vuxapomirogeta-suwigerejipuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_6059b72b5c5e7.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/DShjwgc/vitamix_food_processor_review.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/giSidji/describes_you_to_a_tee_meaning.pdfIn PDF document text
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/9704620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_60367522906d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426558/normal_5ffc63de2ff07.pdfIn PDF document text
    • https://cdn.sqhk.co/mojubemuwek/ajeh6jc/simba_run_condos_2bed_2bath.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_3a98224ccbf449de8c3094e9f284d486.pdf?index=trueIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_939e76d7c2634df38f187cc65b674339.pdf?index=trueIn PDF document text
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_18835785ad5b4f419985c076ff7501fa.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_825ad34e14e540a2a9e4311424803c29.pdf?index=trueIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_791b331548334d489674c784fddd15cc.pdf?index=trueIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_db84950b1180453a9530f229338d0003.pdf?index=trueIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_24a8b2e1cf0947e7ae3390ef3e866170.pdf?index=trueIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_03561801a8fc46e7b0571cd766ae206e.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF621 5592 bytes
SHA-256: a2c2ac4291d81225350288c42064375678499cba25262dd8fcfd8809abb1eae6
font_01_sfnt_off0001097d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097D 5132 bytes
SHA-256: 1891ea14053f764210ee7932316bbe0974f9a360c2b52234d465ab4c5faf4889
font_02_sfnt_off00011b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1A 10936 bytes
SHA-256: 129fdff13e5dc9603148dc2ea26b4713a35637e053faf102398b8c67f52eadbc
font_03_sfnt_off0001406c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1406C 16488 bytes
SHA-256: 91c30074f85501cb5fe9baf33f35f843940bfa30be12b849312283e920dd8f5d

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