Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa8ec9ab07a28d5…

MALICIOUS

PDF

84.8 KB Created: 2021-04-26 12:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: aeeee6428cb3c5990cfd6663abaca08c SHA-1: d26a7b67ee2bc67f36a375ecb7fa9313f12d9cb3 SHA-256: 1aa8ec9ab07a28d593345936c1c05690b8e3a0b7838547458cd424f4d236f8e7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary external URI pointing to 'bologen.ru'. The document body, though heavily obfuscated, appears to be a lure related to a religious query, likely intended to trick users into clicking the malicious link. No scripts were extracted, but the presence of many URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or redirection attempt.

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://bologen.ru/strik?utm_term=what+is+the+message+of+quran PDF link annotation
    • https://kelutatu.weebly.com/uploads/1/3/4/5/134521402/mesujonotaf_vavuvenape_sinarejozakizo_pelozajive.pdfIn PDF document text
    • https://menajogatidufe.weebly.com/uploads/1/3/0/7/130740573/wabap-tegutobo.pdfIn PDF document text
    • http://linza.media/immanuel_kant_theoryuag7f.pdfIn PDF document text
    • http://epipog.com/dulosetasuwqatlj.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/4790038.pdfIn PDF document text
    • http://copyrightviolationcenters.com/90244076419g59ef.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/QpYiegc/9cut_insta_grids_for_instagram.pdfIn PDF document text
    • http://fudazozotakaxal.mywebcommunity.org/core_java_interview_questions_javatpoint.pdfIn PDF document text
    • https://giwedogifuj.weebly.com/uploads/1/3/4/7/134741463/6051697.pdfIn PDF document text
    • https://fasorijaj.weebly.com/uploads/1/3/4/5/134501708/3616827.pdfIn PDF document text
    • http://mebotus.mypressonline.com/thesis_on_biomedical_waste_management.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/dMjcjb2/zanevawilixabamalifisorad.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/Z6iezXj/poliwozarixowigubamerapu.pdfIn PDF document text
    • http://card2card.live/what_happens_in_the_cruel_princedo2bz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabixukavizom.myartsonline.com/56367916343.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/video_er_mac_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c5e4b5-588c-4b9d-a0f6-0f9416842db9/72512719200.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/yes_we_vibe_aqua_shoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f6f069-6e5b-42de-96a3-c2b205af3d5a/spook_who_sat_behind_the_door.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abdca248-f0fe-48ae-8e5d-24315e68e2c6/gufivotulamise.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/suzuki_250_atv_carburetor_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ebaba3-7db3-43b4-b6e4-4826a42e46ec/lojenisanew.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_off00010e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E76 5288 bytes
SHA-256: ebb5a139b1299c6bb84d5e52948ae8235c8564e7de60f3ac13225f66d27ff1d9
font_01_sfnt_off00012054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12054 10996 bytes
SHA-256: d07f86779cfcfed4624d37f4af1dec2921333f78a8a63db1ed3e22a36088f1c3

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