Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59b7286c3bdbe21…

MALICIOUS

PDF

80.2 KB Created: 2021-03-31 16:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f71b664a8dae70e7551fc04ffb66b983 SHA-1: bd8d0d66a24d262da2d38573bd6a458ed249f0ba SHA-256: f59b7286c3bdbe2138f99b5e9543f94d19407c7129ea6ac2bdc90c6c9eae1eda
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URI patterns are commonly associated with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/123?utm_term=jbl+brand+guidelines PDF link annotation
    • https://lafitezin.weebly.com/uploads/1/3/5/3/135323108/jevawuv_fuzamu.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/how_to_export_a_to_paint.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/life_fitness_95x_elliptical_weight.pdfIn PDF document text
    • http://vinnipoh.fun/hdd_low_level_format_tool_serialovp55.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/xchjihG/avatar_dress_up_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/madosodu/f5ia0jV/tik_tok_videos_on_youtube_faisu.pdfIn PDF document text
    • http://tufepuwaw.iblogger.org/cambridge_phonetic_dictionary.pdfIn PDF document text
    • http://golixudib.mypressonline.com/josokoxiwad.pdfIn PDF document text
    • https://cdn.sqhk.co/rowibimibopi/gSXhcji/bomiwexofarokifine.pdfIn PDF document text
    • http://govuled.mywebcommunity.org/sakakekigeromapodexadukir.pdfIn PDF document text
    • http://fulifubajamo.mywebcommunity.org/28371256475.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/31501267087.pdfIn PDF document text
    • https://cdn.sqhk.co/toviranevu/jggg33N/kijevariwob.pdfIn PDF document text
    • https://zeradukiw.weebly.com/uploads/1/3/4/8/134883462/e798263b3d452d.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/zLijOgi/sculpture_center_new_director.pdfIn PDF document text
    • http://olx-delivery.cc/how_to_draw_a_realistic_human_eye_step_by_step_easy3or5w.pdfIn PDF document text
    • http://vekvelo.ru/my_bloody_valentine_movie_1981_parents_guide8lz09.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/fajadapulidur_wedawer.pdfIn PDF document text
    • http://copyrightnotices-form.com/personal_budget_spreadsheet_td_canada_trustffx0y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jupevesu.atwebpages.com/52223300555.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/texidifivipetebukovemerat.pdfIn PDF document text
    • http://texaliborobiko.epizy.com/31399663694.pdfIn PDF document text
    • http://vozovowu.rf.gd/55612750486.pdfIn PDF document text
    • http://jofikuv.atwebpages.com/87497416203.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_off0000fb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB33 5120 bytes
SHA-256: 4ff096bef3dba652306456d593954c75d0636c41d3425db51d7fe00d7849cdb9
font_01_sfnt_off00010ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA3 11376 bytes
SHA-256: 6b4a61255314f4258ab057562fbc05a4244f5bfdb3b27d272d62c81ebe2bd3eb

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