Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e99476cddac02d…

MALICIOUS

PDF

72.7 KB Created: 2021-03-24 05:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 198a573abd9f5c219ea774b452b41cc3 SHA-1: f4aa518de88eee432d8e3da97b39ba332f37940a SHA-256: f2e99476cddac02d35acc3ad1062b339a5e83f7e625247f678d96ad3774bf41b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to printer setup, which is likely a pretext to direct users to malicious sites. The presence of external URIs and the overall structure indicate an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/aws?utm_term=how+to+setup+hp+cp1525nw+wireless PDF link annotation
    • https://niwurakoj.weebly.com/uploads/1/3/4/5/134588258/563486.pdfIn PDF document text
    • https://dudidupu.weebly.com/uploads/1/3/1/3/131380390/c2862f62b84f.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/Sij0Yib/minecraft_mods_1._15._2_backpack.pdfIn PDF document text
    • http://keribek.22web.org/3583196811.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/9425231.pdfIn PDF document text
    • https://cdn.sqhk.co/wibepudib/GhageGe/angamaly_diaries_songs_starmusiq.pdfIn PDF document text
    • http://fonareru.22web.org/xiwaworak.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuvusu/6geggih/math_color_by_number_multiplication_printables.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/HjeSRjb/tumew.pdfIn PDF document text
    • https://wigubidukes.weebly.com/uploads/1/3/1/6/131606651/6094070.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/jdBCvih/gujugezetakus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mulumibapetemom.epizy.com/top_resume_templates_2019.pdfIn PDF document text
    • https://6558ac43-984d-4e3a-97a1-dec8860611ed.filesusr.com/ugd/c73740_6e0e96eef0274d9c96e9d5e39bbe0d39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resixexi/the_hunger_games_mockingjay_part_2_online_free_123.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/adivasi_gana_song_dj.pdfIn PDF document text
    • http://sipomivizipe.epizy.com/kala_patthar_full_movie_hd_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/69063481480.pdfIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_9c95aaf61bc84d3aac7c4e73d17cc501.pdf?index=trueIn PDF document text
    • http://wanikokod.epizy.com/29670597920.pdfIn PDF document text
    • http://losisotudek.epizy.com/power_pressure_cooker_gasket.pdfIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_c5a9e70661614a62b73b55637dcdb639.pdf?index=trueIn 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_off0000dbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 5172 bytes
SHA-256: ed81710793b78237fddd63df32de35ea59a9e0c547e35e1ec122f3e11fff927e
font_01_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 12188 bytes
SHA-256: 9ef1fdb01e49c616b6fd75dffc8b01bcd883106fd2d1cc053431d3116d2bbd89

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