Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ae2c9561354f9b…

MALICIOUS

PDF

82.8 KB Created: 2021-02-25 00:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6733c0b3f12ef819a0f34d393eafc925 SHA-1: 26f88a9aa077231d64950e6bf927d44c67d19dc2 SHA-256: 15ae2c9561354f9b9c58bd4532f84c7b021e49ff6ca752096f29cf6e6575493f
116 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URL and exhibits characteristics of a callback phishing or tech-support scam by prompting the user to call a phone number. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/strik?utm_term=android+development+course+fees+in+chennai PDF link annotation
    • https://cdn.sqhk.co/jifigetuxu/dPOczEF/star_live_wallpaper_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_601b86ac48f0b.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/ihJJgfq/attitude_dope_wallpaper_hd_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/icxXEt3/wechat_ban_update.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/idbvjac/11626041736.pdfIn PDF document text
    • https://cdn.sqhk.co/binuwaxe/ghh4Iic/rum_balls_recipe_with_cake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417138/normal_600c985fe3613.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/efiiVVA/wunidozepagekekopid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_6014dd81a7c7e.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/sony_cyber_shot_dsc_h300_lens_removal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453579/normal_5fd7b273926bf.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/bgTsCjh/superheroes_league_free_fighting_games_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimuwebogikufuf.rf.gd/bleach_vs_naruto_3._2_mod_apk.pdfIn PDF document text
    • http://ruredat.rf.gd/capsa_susun_free_poker_casino.pdfIn PDF document text
    • http://pubitawiwinas.rf.gd/weather_app_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/imo_video_calling_app_for_mac.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001043b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043B 5444 bytes
SHA-256: b0c72644c3c28676b4f8894f710deec3a9ff8e79c300787ad9daae0708050496
font_01_sfnt_off0001169d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 11476 bytes
SHA-256: 5a66dee795628155a99e3faa118e76e99d13461a6902ccae4fea361db5e4c262

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