Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f88b7a4c9c4ef81…

MALICIOUS

PDF

73.4 KB Created: 2021-03-31 12:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c8738d7644d28f5e82d7d8af9cdf919 SHA-1: 6b4f500a9a27b8169ced85ccebb53571ba1befa6 SHA-256: 0f88b7a4c9c4ef815c54cbbd4dc819b167e234d6d1e99946ebe644836afff96b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URL 'https://jacksth.ru/strik?utm_term=google+earth+pro+map+view' suggests a phishing lure related to Google Earth Pro. While no scripts were explicitly extracted, the nature of PDF malware often involves embedded JavaScript to facilitate malicious actions, such as redirecting to phishing sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://jacksth.ru/strik?utm_term=google+earth+pro+map+view
    • http://xitigedomure.66ghz.com/hot_rolled_steel_sheet_thickness.pdf
    • https://molulodanewiv.weebly.com/uploads/1/3/1/6/131606256/rijifodidowadi_todupufa.pdf
    • https://zapunetiregete.weebly.com/uploads/1/3/5/9/135956705/setodakamu.pdf
    • http://sokfresh.fun/xetonirosigelosez5lhka.pdf
    • http://scotiaenlineape-personas.com/dovibokugoxawezexedalijb17n.pdf
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/kavusiwukefun.pdf
    • https://migobajiker.weebly.com/uploads/1/3/5/3/135390735/8440590.pdf
    • https://wofofubuw.weebly.com/uploads/1/3/2/7/132710679/zowuz.pdf
    • https://webutukokixomuw.weebly.com/uploads/1/3/5/3/135317122/kumokosufezureto.pdf
    • http://goodxday.xyz/bofivoxufaxekazojudovenix2jlc.pdf
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/2933395.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ginubav.epizy.com/jiwutazokapegamojuwipi.pdf
    • http://jejafajiw.rf.gd/android_java_arraylist_contains.pdf
    • https://uploads.strikinglycdn.com/files/e3624bc4-bd0b-43f3-9a79-495511caf77c/common_centroid_layout_current_mirror.pdf
    • https://uploads.strikinglycdn.com/files/0c232de2-099e-4ea6-9f38-0d5a822fc917/wovejubunizizegufemof.pdf
    • http://teguxivufir.rf.gd/paponajujexejeponibig.pdf
    • http://tojopoxirer.rf.gd/4_pics_1_word_level_2143_answer.pdf
    • http://wanudozadix.rf.gd/organic_chemistry_alkene_reactions.pdf
    • http://mijekobafenado.rf.gd/83649233418.pdf
    • https://uploads.strikinglycdn.com/files/a773a9a5-df60-4e24-b713-4ed82e251188/10814978541.pdf
    • https://uploads.strikinglycdn.com/files/b4cf0939-0a40-4370-a8e4-75862b9d1168/why_does_my_hp_printer_not_recognise_the_ink_cartridges.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_off0000e183.bin
cf7a1ec68554dbec40ae59a787a5e303fea63eeb6a9c670dff2e6de23a977309		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE183 5236 bytes
font_01_sfnt_off0000f342.bin
2f41f30159ad07283c46bbb436dad99a10512a80faf74134661d1401d544cf3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 10924 bytes

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