Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aee661b2fa77f1e…

MALICIOUS

PDF

72.9 KB Created: 2021-01-09 23:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 51ef21252c8bfc2e3705af3fd6914e54 SHA-1: b371a374cc2c4921b60f8423830bd8d74b51f80a SHA-256: 0aee661b2fa77f1efd223889a2a1858d792102b567d95c883830d3a7221473c3
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded URLs, such as 'https://traffking.ru/aws?utm_term=que+es+robotica+educativa+pdf', indicate a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness, supporting the ClamAV detection of 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=que+es+robotica+educativa+pdf In PDF document text
    • https://cdn.sqhk.co/ruwonumatag/djcSugi/74734802633.pdfIn PDF document text
    • https://site-1166598.mozfiles.com/files/1166598/61419452177.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/xJhietK/pandemic_like_game_app.pdfIn PDF document text
    • https://site-1194826.mozfiles.com/files/1194826/hit_songs_of_kylie_minogue.pdfIn PDF document text
    • https://site-1168354.mozfiles.com/files/1168354/ants_simulator_oyy_meaning.pdfIn PDF document text
    • https://vexixizeled.weebly.com/uploads/1/3/1/3/131384380/f1f1725.pdfIn PDF document text
    • https://site-1168007.mozfiles.com/files/1168007/hagi_tv_bingo_live_stream.pdfIn PDF document text
    • https://powujuraw.weebly.com/uploads/1/3/5/3/135321569/d5b3a.pdfIn PDF document text
    • https://cdn.sqhk.co/konarolikomu/ikNifia/zavowotalilotujetazesege.pdfIn PDF document text
    • https://revunisukigi.weebly.com/uploads/1/3/4/8/134849871/fesovidezimop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sizabo/2969885980.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/vuvofasuladugom.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/citation_machine_fors.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_off0000dcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 5376 bytes
SHA-256: cf4144608dc898be17d4803f7957d9b8414488def6752958b69cd5c0a12f5bdd
font_01_sfnt_off0000ef1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 11664 bytes
SHA-256: 32d5f514526598977e725075e96861205b42d67786c316ff8e21e234a9e7afe6

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