Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d103d9a703149a2…

MALICIOUS

PDF

80.8 KB Created: 2021-05-14 20:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7e03a1f5d8a5c7cceb6f7ae71e758923 SHA-1: 60255836868456eb80536fd961862daee8d90622 SHA-256: 7d103d9a703149a299478dece18e57cbcaa5d7ff22cfc82e6431ecacc21073ac
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to copyright disclaimers, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=how+do+you+write+a+copyright+disclaimer PDF link annotation
    • http://nubatevujonuw.mygamesonline.org/bolt_and_nut_types.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457604/normal_600809ef91d43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412905/normal_5fed9cf885544.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/jjgSjjg/67605746574.pdfIn PDF document text
    • https://xekijepomi.weebly.com/uploads/1/3/4/5/134508866/3056198.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/14432882584.pdfIn PDF document text
    • https://tavadarikozo.weebly.com/uploads/1/3/5/9/135987174/2432807.pdfIn PDF document text
    • https://pivamaxisogen.weebly.com/uploads/1/3/4/4/134481881/firimaniwaxubalogani.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/criminal_psychology_for_dummies.pdfIn PDF document text
    • https://xonedanafesiliw.weebly.com/uploads/1/3/4/6/134633415/mivabopijini-gakufunumetuwu.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/7953908.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/3085111.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/hgJgahj/51786043610.pdfIn PDF document text
    • https://cdn.sqhk.co/kawaxixe/QjIggCw/80080975248.pdfIn PDF document text
    • https://ritidovonu.weebly.com/uploads/1/3/4/4/134467098/vefomopupewate.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/40154530037.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/automate_the_boring_stuff.pdfIn PDF document text
    • http://daxavepevepa.mypressonline.com/google_classroom_help.pdfIn PDF document text
    • http://nijepatexosanus.medianewsonline.com/vuxoromodirodaneve.pdfIn PDF document text
    • https://cdn.sqhk.co/rufonova/dIbdhj0/forza_7_car_list_spreadsheet.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/315301.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
    • http://fajazimigig.atwebpages.com/16376791587.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/what_are_the_qualities_of_a_good_motivational_speaker.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_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 5420 bytes
SHA-256: 1b64d61275d3951297469dbe85f9c172f870a63bf0c977d0c3f73b7fa46a6ded
font_01_sfnt_off0000ffda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDA 11612 bytes
SHA-256: 38cce075e1f4fb069a85c4f93386db461f828354fb078e5e1523d403718ce399
font_02_sfnt_off0001270a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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