Malicious PDF — malware analysis report

Static analysis result for SHA-256 825a426a1bc3f5da…

MALICIOUS

PDF

80.2 KB Created: 2021-03-18 12:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 943deb6fed740f84512f69a34629a806 SHA-1: 742e35441f7908f8950724ce1e7473ad29456863 SHA-256: 825a426a1bc3f5da38a5885bc673a486c16ba19bd6e2d0088ffc877bcfe396b7
196 Risk Score

Malware Insights

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

The document exhibits characteristics of a phishing attack, specifically targeting recovery secrets or private keys. It employs social engineering by instructing the user to copy and paste content into a command-line interface, likely to facilitate the exfiltration of sensitive information or the execution of malicious commands. The presence of multiple external URLs suggests a potential for downloading further payloads or redirecting the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=create+unsigned+apk+react+native
    • https://dodanopo.weebly.com/uploads/1/3/1/4/131408738/mojikowagarosoral.pdf
    • https://cdn-cms.f-static.net/uploads/4417039/normal_603e290a8563e.pdf
    • https://static.s123-cdn-static.com/uploads/4454967/normal_6007ece264375.pdf
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/bdc488.pdf
    • https://cdn.sqhk.co/fokodusi/dBJjajf/that_s_life_lyrics_joker.pdf
    • https://cdn.sqhk.co/gijosevozu/ghihcii/stick_it_soundtrack.pdf
    • https://cdn.sqhk.co/bitaxukezor/T75W4jf/mlb_standings_playoffs_wildcard.pdf
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/5140974.pdf
    • https://xedafiwiwez.weebly.com/uploads/1/3/2/3/132302754/sexixuronidufox-biviku-lamanisaso-xutimoviji.pdf
    • https://cdn-cms.f-static.net/uploads/4411512/normal_6042de95b3352.pdf
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/gexujonizawotigaz.pdf
    • https://static.s123-cdn-static.com/uploads/4391620/normal_6003fa0190edd.pdf
    • https://cdn.sqhk.co/puzadowoke/r5jhZzd/youtube_learn_to_sing_in_tune.pdf
    • https://cdn.sqhk.co/keximovib/ddz9tTT/prescription_sunglasses_red_lenses.pdf
    • https://cdn.sqhk.co/vuxesojogugu/Uhaiggf/26036333620.pdf
    • https://xazonulukobimov.weebly.com/uploads/1/3/2/7/132712199/poxiniwogu-dezifurigodapoz.pdf
    • https://cdn.sqhk.co/nelenikarate/X89gfLG/patazizariguwigodurewed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/memobofilenabon/what_are_the_nutritional_requirements_for_elderly.pdf
    • https://s3.amazonaws.com/kewuxejikiwe/demomexidusujoni.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa8c.bin
640bd4821857adfa98156a1c78c034f63e13e93d4c12f29dfb1eb43aa81866e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8C 5240 bytes
font_01_sfnt_off00010c73.bin
93c6696e40dab266a7d381507b8adf919e321c0100b410f75558f60c5843da26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C73 11520 bytes

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