Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0fe08cb5d1e1a6…

MALICIOUS

PDF

76.5 KB Created: 2021-04-04 09:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c2fb7b0bedb4df5101f86a0e6c0a6ab SHA-1: 3278a9320fd41a6a8f48eec41e2cdc3c62e64f18 SHA-256: 8b0fe08cb5d1e1a6163d85d2fdc96eeb8f0adf152cbec53208bff6a7e157f848
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to software plugins. The presence of multiple external URIs and the ML classifier's high confidence score strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=how+to+add+plugins+to+fl+studio+demo
    • https://cdn.sqhk.co/kakolutezegu/eNiiihD/dowakebofadamilimi.pdf
    • https://wesonibisizigoj.weebly.com/uploads/1/3/0/9/130969529/xasopega-nitibag-diwizom.pdf
    • https://cdn.sqhk.co/fukonovum/dU5ighg/pixel_gun_3d_danny_online_battle_royale.pdf
    • https://cdn.sqhk.co/goxufime/geyge0a/84688996948.pdf
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/30c1ceb.pdf
    • https://static.s123-cdn-static.com/uploads/4365583/normal_60091a4d377c0.pdf
    • https://dokerawu.weebly.com/uploads/1/3/4/3/134313580/babowafakapafa_nagup.pdf
    • https://cdn.sqhk.co/jufenakajo/ifghjgj/citra_3ds_emulator_pokemon_x.pdf
    • https://cdn.sqhk.co/fiwujumejuf/jgjfjiI/9519955524.pdf
    • https://fevowavekotaxuw.weebly.com/uploads/1/3/4/6/134635114/bogomedujusupiw.pdf
    • https://static.s123-cdn-static.com/uploads/4467581/normal_60033a1ac8276.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rufonali/32014792446.pdf
    • https://s3.amazonaws.com/xazarujokemus/america_the_essential_learning_edition_volume_1_2nd_edition.pdf
    • http://xuxivobanirug.epizy.com/46640598134.pdf
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_b5a480dec0754564be7d34a091059c1e.pdf?index=true
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_4cfff3227ae7429ca19c184c59b801a3.pdf?index=true
    • https://704d67de-a0ba-412a-a77d-f8c4cf0d88a3.filesusr.com/ugd/a83d94_e72fed0ab055429d8fccf9bfc456ec30.pdf?index=true
    • https://s3.amazonaws.com/tiduro/philips_saeco_syntia_coffee_machine_manual.pdf
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_36e3f0d5992140398522c3345744d71d.pdf?index=true
    • http://bulufuw.rf.gd/jaxudukonozoradeninurogun.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba0.bin
aa812d86eaca5f5f3c5d87ce17d5f2e0078763d61013d1f6a4b422cf5688f8ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 5316 bytes
font_01_sfnt_off0000fdbe.bin
be8d2eb68e889af6a04668be4bf3250e337d48b7bc9f3315faf70502d92116d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 10996 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.