Malicious PDF — malware analysis report

Static analysis result for SHA-256 a426c2775e302759…

MALICIOUS

PDF

82.2 KB Created: 2021-04-05 03:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a33d251a50e99f54e1d3ea071d3c41fe SHA-1: d42ef408dce695ecdca94c3064c67ecb54a29665 SHA-256: a426c2775e3027599075b09c410e88f1c85a26afd78532a9e22ff102072ef196
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for a popular game's APK download, strongly suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection further corroborate its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dafemum.ru/wix?keyword=yu+gi+oh+duel+links+latest+apk+download
    • https://cdn.sqhk.co/gijosevozu/jhfiaJk/american_football_band_merch_europe.pdf
    • https://cdn.sqhk.co/wejupexuput/9jejcja/sobapasafunowinufokademi.pdf
    • https://cdn.sqhk.co/pelemobi/XjeifaR/wibolo.pdf
    • https://cdn.sqhk.co/dofexoxev/KgeGkKn/86081254839.pdf
    • http://sdfsdfsdf.shaketorch.com/tacky_the_penguin_printables.pdf
    • http://ig-verifiedsbadge.com/this_momentary_marriage_study_guideb7hrc.pdf
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdf
    • http://sayseedokg.com/668439674489w1w6.pdf
    • http://confirmyourverifiedbadge.com/a_midsummer_nights_dream_character_analysisf70jd.pdf
    • https://cdn.sqhk.co/gufezitaxato/2gxppZb/38031818740.pdf
    • https://cdn.sqhk.co/sadirorig/bDsMUjN/mubetadirisobizovufuwo.pdf
    • https://cdn.sqhk.co/fovipobex/c8tZ7Rc/hachi_movie_japanese.pdf
    • http://wazepewazivulil.mywebcommunity.org/61596924043.pdf
    • https://cdn.sqhk.co/livujiguf/ggeVZxt/zabavokodufepudizujarume.pdf
    • https://cdn.sqhk.co/govovazeket/gjb6xia/icici_mobile_recharge_coupon_code.pdf
    • https://cdn.sqhk.co/rakapuvad/Zijjchi/improve_archery_kingdom_come_deliverance.pdf
    • http://malolufixanovas.sportsontheweb.net/space_encyclopedia_book.pdf
    • https://cdn.sqhk.co/voxedifi/hKZhehi/7040470199.pdf
    • http://soldonlakewood.com/regaledejimigapjscua.pdf
    • https://cdn.sqhk.co/sotatixorawi/jbPC6Qt/dropping_ball_2020.pdf
    • https://cdn.sqhk.co/rubovadu/gieI8gg/60835626981.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jomewudixaf.epizy.com/tixopegoxi.pdf
    • http://musarozopod.rf.gd/sosapunavapamami.pdf
    • http://fifusudevop.rf.gd/zolodakunora.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f767.bin
c53ea7f80de5fc452450e68400c6ff7f05fe297ad8dfc22d6e8e2b2a538e2212		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF767 3160 bytes
font_01_sfnt_off00010298.bin
4f2453ba9d03298cbc042215ac3a9fec8f0de8b4e2125032d9ab3e59405ee10f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 5240 bytes
font_02_sfnt_off00011482.bin
e6c8df83b92c74fc2dd20d65a6924fe6b1029c9e35cbbcc697fc238b7eb81e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11482 11680 bytes

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