Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afb93ef0ac45b1d…

MALICIOUS

PDF

77.2 KB Created: 2021-03-13 20:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 82f3d4e72127db211a3e37837e8551e2 SHA-1: f20595aa72ae2fba75855f46607052cc2448d68e SHA-256: 8afb93ef0ac45b1dee5530535cabca926a9c35002b64ebb0246d5a07bb4a51e2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'golowaki.ru', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that this document is designed to redirect users to potentially harmful external sites.

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 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://golowaki.ru/award?keyword=traductor+pdf+aleman+espa%25C3%25B1ol+online PDF link annotation
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/rifonulasawobe-vokofojorun-buwevokakoba-jivobodexutulol.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/hh5jbL0/java_old_version_8_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/dijhclH/fibovapagik.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/iaMDjim/my_kingdom_for_the_princess_2_cheats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454665/normal_5fee3768ef309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477387/normal_5fddaf7e77a46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485822/normal_6026d42277504.pdfIn PDF document text
    • https://pixasowurixes.weebly.com/uploads/1/3/4/9/134904492/mosiboxekefonumuguvu.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/gemut.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/ilive_true_wireless_bluetooth_waterproof_earbuds_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380857/normal_5fc72aa1a810a.pdfIn PDF document text
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/kufepilalaguwilitaf.pdfIn PDF document text
    • http://keluzizizeroki.getenjoyment.net/catholic_encyclopedia_vol_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_6037d3a21ad1e.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/05b10e5a-10bc-4001-8627-b67a27bb7a8c/jidixesigawasebofedelepod.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/pawuzukokutowigajeto.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/tebujotokidolevirigetigiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df5db22-bb4d-4279-90b3-670e8f19ed82/how_to_tell_liftmaster_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37bd338-094f-4281-8976-6b9812d1df45/81679805333.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/hydrogel_or_sheet_mask.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_off0000eacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 5464 bytes
SHA-256: 6ea5f80e8ee645a93b98f8dca6ad07e5a037f985c02e541d4e12b61a36158254
font_01_sfnt_off0000fd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 13092 bytes
SHA-256: 96b4e160c8b14ced386be29f73819622db2d4542c100f676cba4476adde78b52

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