Malicious PDF — malware analysis report

Static analysis result for SHA-256 099d865750860891…

MALICIOUS

PDF

139.6 KB Created: 2021-09-16 05:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9e0bafe69cefdf919db4b34f913a0b36 SHA-1: 199e1b438b4b06cfdc972722651a7b815ad4deae SHA-256: 099d865750860891928f56ea13fb9dec111ba4852ee3e3d285136639930658e5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and heuristics indicate it is malicious, with a high ML score and ClamAV detection. The document body, though truncated, suggests a lure for executing commands via copy-pasting, a common tactic for downloading further stages. The presence of multiple unknown URLs, including one hosted on a potentially disposable domain, further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 8

  • 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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.tiande-global.com/ckfinder/userfiles/files/52155037310.pdf In PDF document text
    • http://szjg.hu/images/file/86165399806.pdfIn PDF document text
    • http://dejede.com/userfiles/file/1857226896.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/40765833476.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/22896869857.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/26267159122.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75004982471.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/sedotidorosisugugelax.pdfIn PDF document text
    • http://minerva-collection.net/files/files/ravodupa.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/41925526448.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/11284805939.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/64327551337.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/30047946039.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/62186101564.pdfIn PDF document text
    • https://anbc31.iscriptscloud.com/app/webroot/files/file/totefipiwajovuloza.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/66343233020.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/64990053938.pdfIn PDF document text
    • https://igraonica.me/userfiles/file/muxabodomif.pdfIn PDF document text
    • http://105chers.netsociality.com/upload/files/toxevezifitunosevig.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/78225996571.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-14/20210914082207964886.pdfIn PDF document text
    • http://gewidor-gmbh.de/uploads/files/dulodasakeve.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/nigewimeriwutudok.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/37574500077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+unlock+redmi+note+9+proPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5B7 22308 bytes
SHA-256: f5def880c773167c318b93fe8ac80a9796e0ad352f8040f78f57bce0b02c812a
font_01_sfnt_off0001efe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000207f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207F9 10784 bytes
SHA-256: 729d53f5addd376647c7c8e06432998f0a96dfcc31ed38d92122a8e090cf4f23

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