Malicious PDF — malware analysis report

Static analysis result for SHA-256 deaa90dbf184db6e…

MALICIOUS

PDF

80.3 KB Created: 2021-05-11 05:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 45ddde85a879af480d18ff517fe2c363 SHA-1: 9e1011e049cac71419497dbefbf794f3ee4b21d3 SHA-256: deaa90dbf184db6efc231653d3f3d769f72af2cf4d8f1a84290c3fc24f7bb43e
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, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=filter+json+array+in+c%2523 PDF link annotation
    • https://cdn.sqhk.co/wepunajexiju/giYihmv/tarirejujobidunonuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/rolizemixij/hFyD8ji/vixuninunakodatiwipifaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365638/normal_5fdda4712a94a.pdfIn PDF document text
    • http://espaceabone.com/what_are_essential_linux_commandsur6kb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_60361fa5483e3.pdfIn PDF document text
    • https://cdn.sqhk.co/jumosanex/OOjeifZ/galaxia_la_picosa_en_linea.pdfIn PDF document text
    • http://trynutra.shop/simvastatin_davis_drugxtifr.pdfIn PDF document text
    • http://topmassage.net/keli_kore_assamese_borgeet_freeuxd6w.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/vogokatepifopaniful.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/cjbfhaE/download_slow_english_music_mp3_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bajafigotuvi/8uxidgd/12195792193.pdfIn PDF document text
    • http://bilkan.fun/fallen_angel_book_series_lauren_katewxczn.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/liparixajutofadamarsxotq.pdfIn PDF document text
    • https://cdn.sqhk.co/gobopovupav/ipwhcaX/god_simulator_roblox_codes_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/eifhjqK/85734352434.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/il_canzoniere_della_morte.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/jeF6jav/starfall_numbers_7.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5fdc3b7eaab44.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
    • http://kojuvurapamox.myartsonline.com/where_to_buy_blood_pressure_cuffs.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/84623118469.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_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 4712 bytes
SHA-256: 245635d347dea7e8052ae1fe4042ec4273772b0d432ab16c7ef2ef35840668b2
font_01_sfnt_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 11204 bytes
SHA-256: 2adab2c297d4489707e87bf9ebf0300f5c434412c83d58e14900c82922b8ac91
font_02_sfnt_off00012438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12438 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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