Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca724e9e0745b6e…

MALICIOUS

PDF

84.5 KB Created: 2021-04-04 08:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2fc2f6492c6caa84ef68ffddd08d4197 SHA-1: 08080c24c8d8439109f8fe74497a27ae99fb5543 SHA-256: fca724e9e0745b6ec02ff5aeef74fa7145f4a633487922da3327c18fce52f308
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous external URIs, with a primary suspicious URL pointing to 'ponafet.ru'. The document's structure and the presence of multiple external links suggest an attempt to redirect users to potentially malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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/award?keyword=acuerdos+de+ginebra+pdf PDF link annotation
    • https://fakivafepupu.weebly.com/uploads/1/3/0/8/130873921/63fbd3.pdfIn PDF document text
    • https://jubekese.weebly.com/uploads/1/3/1/6/131606730/wuduto.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/66025675197.pdfIn PDF document text
    • https://powilumoratome.weebly.com/uploads/1/3/4/3/134368047/5783526.pdfIn PDF document text
    • http://keksik24.ru/46874374585o27zl.pdfIn PDF document text
    • http://tuimag.ru/28940169716r2a4j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e99b9817-4a97-4805-91d4-26c7c9c5782a/rinikopijoxuvisifinuton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4010bd32-165f-44f3-b539-7971ac3758da/viniparujilavi.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_a8c8f76411e741489a66bac8185f76dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/233e4f74-ea05-4ff4-abf0-208af61af372/approach_avoidance_motivation_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f14dbd-88ec-434e-8c83-6288133e163f/why_laptop_charging_light_blinking.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/puzozurowowogulazadadijo.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_eaf2ca4a5cad4b11bf93e6d9f16c5325.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/48389832026.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/filosofia_da_composio_edgar_allan_poe_download.pdfIn PDF document text
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_e5914976c78a4b3583029dc370541f98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/foneniz/how_much_does_it_cost_for_a_water_softener_system.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/zisapakanukobixopuwi.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_1ec7003d32f54b42ae234d886e5d6a31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/zirarununive.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 5220 bytes
SHA-256: ba3e5996a39e5b9212059f372174851bd65e3122737bad2bdc08b27b1e5ea6cf
font_01_sfnt_off00010def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEF 12180 bytes
SHA-256: 41f338edbea1dbaa0af89e795ca2b3ae1cef391c68ee64613ac57d7f59ec0819
font_02_sfnt_off00013545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13545 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378