Malicious PDF — malware analysis report

Static analysis result for SHA-256 173be9ec452ea7fd…

MALICIOUS

PDF

102.6 KB Created: 2021-03-10 06:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a51edc845184af52fa846ecba09daad7 SHA-1: 57b95c825b13773fc4fd2824485f4c3b2754a0b8 SHA-256: 173be9ec452ea7fd1dc3c2cc8c2d00763e1528823eba39f3e949b0014b9b1b3d
174 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically prompting the user to install a browser extension or update. It also contains numerous external URIs, with 'https://botokaw.ru/wix?keyword=gse+iptv+apk' and 'http://parrrtner.xyz/nuwiwuvepurexaliris87yw9.pdf' being prominent examples. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to credential theft or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=gse+iptv+apk
    • http://parrrtner.xyz/nuwiwuvepurexaliris87yw9.pdf
    • http://nomevufaneboja.mypressonline.com/harry_potter_y_las_reliquias_de_la_muerte_resumen_del_libro_de_daniel.pdf
    • https://cdn-cms.f-static.net/uploads/4416798/normal_601ad31d3b7f3.pdf
    • http://kazexajisodibu.medianewsonline.com/youtube_christmas_carols_silent_night_lyrics.pdf
    • https://static.s123-cdn-static.com/uploads/4393188/normal_60044c9dca2db.pdf
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/3210022.pdf
    • https://static.s123-cdn-static.com/uploads/4488855/normal_5fe5a9d8577a6.pdf
    • http://gomigapujasep.sportsontheweb.net/part_time_night_shift_jobs_las_vegas.pdf
    • https://cdn-cms.f-static.net/uploads/4445739/normal_6012096eb7357.pdf
    • http://appletopshop.ru/tavomidumevuvuxuf3qib.pdf
    • http://legendbilisim.com/valamiraxowunetunapujels86l.pdf
    • http://notdull-eng.online/kudivasejazetovogabanotwjo5.pdf
    • http://goladelexugezi.sportsontheweb.net/40666330617.pdf
    • https://static.s123-cdn-static.com/uploads/4466676/normal_5fcbbee7d3621.pdf
    • http://saduzemed.mypressonline.com/bikotobafatixirinu.pdf
    • https://gixifufu.weebly.com/uploads/1/3/3/9/133999878/c7bc40aa64.pdf
    • https://cdn-cms.f-static.net/uploads/4379474/normal_600cb80a72dca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ritumogadoj.onlinewebshop.net/rabafoxudumoputuwivima.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016ebe.bin
96caa2418561955394e571db0b2426bae2fa5354f8df10c3a4a9bfa0c6de63ae		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16EBE 19264 bytes
font_00_sfnt_off00013401.bin
f0e8ba94c2d3a32aadd809e460ad72d75e14b6e4204b4f28a905807f0e1bc805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13401 4840 bytes
font_01_sfnt_off00014499.bin
84a89c680a686985b147e2b9bc2c5a9bf1a7b926b3ef826963cc324090434c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14499 13064 bytes

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