Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa57dba63eb69862…

MALICIOUS

PDF

82.1 KB Created: 2021-02-12 01:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f9ccaf04845b158b831c0e162daf97ee SHA-1: 2e1fa20574dc94af369d38548e73aba1a934a59f SHA-256: fa57dba63eb698629f2cfb9c5ae4a5a000ed28df672aaed70da8a5aa5fcc3fed
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links to external websites, many of which are hosted on disposable domains, suggesting a link farm or redirection scheme to deliver malware. The document body, though heavily obfuscated, appears to be a lure related to 'Oxy acetylene welding process pdf'. No scripts were extracted, but the presence of multiple external URIs points to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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/wb?keyword=oxy%20acetylene%20welding%20process%20pdf PDF link annotation
    • http://jasavutarapif.22web.org/tyler_the_creator_boredom_free.pdfIn PDF document text
    • http://muldwych.com/xubeximowisawakemofuwawox8vsy.pdfIn PDF document text
    • http://stickerrus.ru/fogibivenefovusewediwub9ynym.pdfIn PDF document text
    • http://crawlmqyu.space/lasopezagilowusovemugu9ujwd.pdfIn PDF document text
    • http://load-bcp.com/xasewenijwtmn.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/ijhi5hf/mokiloboxipubozo.pdfIn PDF document text
    • http://spain50off.info/q_launcher_android_10_apkhhjig.pdfIn PDF document text
    • http://ledy66.net/definite_and_indefinite_articles_spanish_worksheetcyc1e.pdfIn PDF document text
    • http://ketorebagibof.22web.org/nc_dmv_practice_test_cheat_sheet.pdfIn PDF document text
    • http://universe1.space/folilazonalobuxepasaluzuy04tk.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/ahc4hbB/gas_mask_photo_editor_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421767/normal_5feb5cea2c2dd.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/22544573076c8l6b.pdfIn PDF document text
    • https://cdn.sqhk.co/mitajaso/WjfKojd/34942469152.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://lizomepikoxi.epizy.com/xegefode.pdfIn PDF document text
    • http://tirejazanapo.epizy.com/dobatose.pdfIn PDF document text
    • http://waboxizolomove.rf.gd/kufuzunizomawi.pdfIn PDF document text
    • http://kewugozosefo.epizy.com/duxurijora.pdfIn PDF document text
    • http://girogabunuxumu.rf.gd/traditional_chinese_font_ttf.pdfIn PDF document text
    • http://zasegusof.epizy.com/13449592153.pdfIn PDF document text
    • http://zasidad.epizy.com/5214432618.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_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 5400 bytes
SHA-256: 5183ded15165fbe619a7106716192f806b9c13ff754c2a8816dd43ce0daeb5dd
font_01_sfnt_off00010981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10981 10200 bytes
SHA-256: cd1987ad2cde6cf334d1eee5d0d88eaf36dd1ad05893039aee5162c6802e9b76
font_02_sfnt_off00012c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C73 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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