Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ff509ec3f9d1ec…

MALICIOUS

PDF

77.9 KB Created: 2021-03-21 20:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c311b25797bbaadf95d8d4f88d204e5 SHA-1: 50142b6588ccb27feac480612c36492f303e0a18 SHA-256: 77ff509ec3f9d1ec473842d238e53dcaac0b04655530a9029c075f691532374a
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains an embedded URI pointing to a suspicious domain, likely used to host phishing content or a secondary payload. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites.

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://gimoguvi.ru/wix?keyword=all+in+favor+say+aye+meme
    • https://cdn.sqhk.co/bafujifi/B5idAig/nba_2k20_myteam_locker_codes_that_never_expire.pdf
    • http://kemedejovon.getenjoyment.net/how_many_calories_in_a_soft_chicken_taco.pdf
    • https://cdn-cms.f-static.net/uploads/4427799/normal_5fd7d728c30d9.pdf
    • https://cdn.sqhk.co/sofawaju/Tijjhgg/good_thief_kingdom_come_deliverance.pdf
    • https://cdn.sqhk.co/jomawutid/jP3FILS/rapumepewininevajiboxoli.pdf
    • https://static.s123-cdn-static.com/uploads/4369311/normal_5fdda36da1c7c.pdf
    • https://static.s123-cdn-static.com/uploads/4454681/normal_5fdf9cc5bd7aa.pdf
    • http://wojurimaxab.mywebcommunity.org/arithmetic_series_problems_and_solutions.pdf
    • https://cdn-cms.f-static.net/uploads/4452835/normal_604d3bdb536f2.pdf
    • https://cdn.sqhk.co/tinipuded/tKy34ja/pokemon_detective_pikachu_movie_trailer_2.pdf
    • https://cdn.sqhk.co/nufesewepi/fzGhgUI/dazijifimobavafufam.pdf
    • http://dojemop.mywebcommunity.org/12252364700.pdf
    • https://cdn.sqhk.co/wesuwajil/gEghjcO/toilet_runs_intermittently_after_replacing_flapper.pdf
    • https://cdn.sqhk.co/busibelifiv/jhhhLMj/dailymotion_turn_off_autoplay.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/fobupojowojon/arris_modem_sbg6580_manual.pdf
    • https://s3.amazonaws.com/defujo/sujaxasene.pdf
    • https://s3.amazonaws.com/vebenok/2184426985.pdf
    • https://s3.amazonaws.com/ronenitevodo/conclusions_for_lab_reports.pdf
    • http://rosajeku.myartsonline.com/georges_marvelous_medicine_vocabulary_activities.pdf
    • https://s3.amazonaws.com/tugabijenovili/nozobasovuxe.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_off0000e55e.bin
dbc4473c9c81eaa2d604e8f20ee18fed6adbb23521386231b88401f381479655		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE55E 5064 bytes
font_01_sfnt_off0000f695.bin
f54868a3fce3bfdfc45a06dcffcc2918e3e16d98353ad6479d7d10fcf5cb2f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF695 11880 bytes
font_02_sfnt_off00011df8.bin
504d26ea3bde44aa39576bba2f7cf3388943bafaedb9ccbc583c5c79ed5b79e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF8 2948 bytes

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