Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc481d4fe3fd574…

MALICIOUS

PDF

74.6 KB Created: 2021-04-03 10:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae459b96fc89de012a0a0ab790489397 SHA-1: 41a29a7d338bea42cd186aa128bee1b56dcc06cb SHA-256: 0cc481d4fe3fd574e9a477e3b9f655d1b2c7f5ccd0c9d5f7f0b4be54c0b549bf
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. A high-confidence ML classifier also identified it as malicious. The document contains a heuristic indicating a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running malicious code. The embedded URL points to a suspicious domain, likely related to the payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://golowaki.ru/award?keyword=jquery+base64+encode+pdf
    • http://lnstagramcopyrightservices.org/iphone_parental_control_limit_screen_time8hyue.pdf
    • http://yoganchik.space/41063456538ydcbr.pdf
    • http://yourcy.com/blood_of_a_stranger_moviex14xo.pdf
    • http://technodom11.com/33954194102rljfz.pdf
    • http://hotloveme.online/67940726428regr4.pdf
    • http://geponimodenebev.22web.org/zaloxidixi.pdf
    • http://esclub.pro/831121406464latg.pdf
    • http://itdomen.fun/41423696769p42tn.pdf
    • http://triple-doska4.club/zombie_survival_guide9q5fg.pdf
    • http://rorujav.22web.org/mewilavemitife.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vosowetawevu.epizy.com/bombarded_with_information_meaning.pdf
    • https://uploads.strikinglycdn.com/files/3ffb4356-377c-4498-902e-47d6637610f3/14958108788.pdf
    • https://uploads.strikinglycdn.com/files/75c0dfef-1892-48e7-ba28-654877767f98/lolibadadixuzisukem.pdf
    • http://moferamobonar.epizy.com/53960300227.pdf
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_c73d8999b0864351a503259028e4c5f5.pdf?index=true
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_83e7c6ce01de4367b058de8e3d74755c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/186c1e33-da9d-4285-b9e1-c84f7b2db044/woods_model_50008_timer_not_working.pdf
    • http://gamebunamol.rf.gd/dosukomofajapa.pdf
    • http://nejoluf.epizy.com/zoxovevuju.pdf
    • https://uploads.strikinglycdn.com/files/5df0a20e-edd6-48c6-b64c-717824eedc2d/chefs_choice_diamond_hone_knife_sharpener_instructions.pdf
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_4ff643ff2a3f4fae8488d719cdaf0d26.pdf?index=true
    • http://najanezajuv.epizy.com/hamartome_verruqueux.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_off0000ce60.bin
331bbe285e5b9e18029b7619f5487f411fb853a249eceb712d82dc5dd36b80c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE60 5716 bytes
font_01_sfnt_off0000e1ec.bin
32358e11195b7bc74dc69b1ec77337797b27d2319967fb2d51345f7f977fbe63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 6520 bytes
font_02_sfnt_off0000f3df.bin
cbe351363c421ac61e8cd1ffa91235f4a865ef8b2e31ef14a765686b3204eed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 11980 bytes

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