Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd083de90a19951b…

MALICIOUS

PDF

70.5 KB Created: 2021-03-02 16:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ea7fa1dfdd48a264824f77aa33ff75c9 SHA-1: d588abb9999284dbc2020de414937184c2e859ca SHA-256: cd083de90a19951bf93b1fbcb66a9e4e402a646f1d8bf7668696cd94f28c9f79
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous external links, with a primary focus on directing users to 'mezovuduw.ru', likely to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to starting a business, consistent with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/award?keyword=how+to+start+an+electronics+business PDF link annotation
    • http://lupelisizi.medianewsonline.com/a_scanner_darkly_full_movie_streaming_free.pdfIn PDF document text
    • http://prodit.space/87065231542kb7ex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_60255c47c2b1d.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/bionaire_humidifier_filter_change.pdfIn PDF document text
    • http://zekaxezixil.medianewsonline.com/samsung_bn59_remote_volume_not_working.pdfIn PDF document text
    • http://dududuw.mypressonline.com/christian_childrens_stories_for_church.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5fd3aeee78429.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/schwinn_exercise_bike_problems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5fd1076d63bc5.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/how_to_read_neptune_t_10_water_meter.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
    • https://s3.amazonaws.com/gixawetopoli/94014604194.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/a_clash_of_kings_best_chapters.pdfIn PDF document text
    • http://tokozod.myartsonline.com/39996025621.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/72387916527.pdfIn PDF document text
    • http://mumopuvak.epizy.com/gapimowevukotezategagil.pdfIn PDF document text
    • http://dusozizogotudim.epizy.com/ffxiv_dragoon_quest_guide.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_off0000ca37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA37 4868 bytes
SHA-256: 4d8d915776ab51aa10ecd41936f65af34badbce405fe4c93af8354578569d87c
font_01_sfnt_off0000dadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADB 10476 bytes
SHA-256: e3a814f1d479836d3cda29d99275b0987627149eb40f4fcab90163c2a4041284
font_02_sfnt_off0000fec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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