Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf698f953dc0b4e3…

MALICIOUS

PDF

81.2 KB Created: 2021-02-23 02:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 346df393a62aa360557a7842088d79d2 SHA-1: ee29c968812324ea2e6218f8c03888a975c48272 SHA-256: bf698f953dc0b4e37824c7e91e17fdea4413b15d7152a517d7304edb519afc47
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are designed to mimic search results or common queries, such as 'why does my canon camera screen go black'. The primary malicious URL, https://baarspo.ru/strik, is likely intended to host phishing content or further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

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 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.
  • 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://baarspo.ru/strik?utm_term=why+does+my+canon+camera+screen+go+black PDF link annotation
    • https://wojebera.weebly.com/uploads/1/3/0/7/130775791/72635afffa5baba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488323/normal_5fcb5b03183e2.pdfIn PDF document text
    • http://jiludedo.iblogger.org/20442949571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454043/normal_5fd67d5c3dd60.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://s3.amazonaws.com/ginutu/answer_my_question_traduo.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/48790938614.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/byju_s._apk_free.pdfIn PDF document text
    • http://bejuzijufure.rf.gd/fojawuvonoxepamaxag.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/behringer_um2_manual_portugues.pdfIn PDF document text
    • http://gokujipavelidaz.rf.gd/ek_chumma_video_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/blinded_by_your_grace_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/23811680022.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/97302507006.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_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 5332 bytes
SHA-256: d048ce3342fcbb6ba6ece4f5f1cde15cde8c950ab8f893c68106fe2a80cd9724
font_01_sfnt_off000105ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EA 10624 bytes
SHA-256: bea7bb2c29399f3eed5dad18b39782649124a6aad5ce40a2117419f8607a11b2
font_02_sfnt_off00012976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12976 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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