Malicious PDF — malware analysis report

Static analysis result for SHA-256 454e66ca7c408c38…

MALICIOUS

PDF

75.1 KB Created: 2021-03-07 08:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a91308f7994e89f73d984e07c2110559 SHA-1: 7ad5ba0ea99d87253c04c3a98abcadbd2e24447b SHA-256: 454e66ca7c408c38657b532e57d9d46829401e0d710c27d9f87c4e68bdb00586
266 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or spamming operation. The document also employs social engineering tactics, specifically a 'ClickFix' lure, instructing the user to copy and paste commands into a terminal, likely to download and execute a second-stage payload. No scripts were extracted, but the presence of embedded URLs and the social engineering lures strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • 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://jottigo.ru/123?utm_term=plantronics+wireless+headset+usb+not+recognized PDF link annotation
    • https://tirotoperanape.weebly.com/uploads/1/3/4/3/134315774/magesap_xamasovalazuno.pdfIn PDF document text
    • http://yoganchik.space/puzelujogejpwwgq.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/hijaCig/mud_bogging_video_games.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/xoxalameguravo.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/jowal-gifuvisuda.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/iUqWhae/subway_team_valley_gateshead.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/wordpress_login_page_address.pdfIn PDF document text
    • http://nafepuzemobir.sportsontheweb.net/sojaxixu.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/dBgd4CM/bluetooth_receiver_nintendo_switch_lite.pdfIn PDF document text
    • http://winfreeiphone.xyz/how_to_make_an_adventure_bookq6dwy.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/compound_interest_questions_in_hindi.pdfIn PDF document text
    • http://qupieasy.online/desexobacj0pv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/75469134208.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_e77b2ef85f2b432fb8f0afbe6d896086.pdf?index=trueIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_26f55a0a187640b59144ebd7be286806.pdf?index=trueIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_2a61affb7055442b9282a18136f4d020.pdf?index=trueIn PDF document text
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_1e651e752d204707b236aecaac3d5ff2.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_f9e037a495954e73aa591bef90a96456.pdf?index=trueIn PDF document text
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_2ff207d586f642ad81af1ac8c21dd42c.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_0dd8cc31526048488881f31c29138205.pdf?index=trueIn 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_off0000e781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE781 5484 bytes
SHA-256: 9555d5616d7dbb18dc47f46cd6322981ae3d1a661b0a5cc0d0769f077344e562
font_01_sfnt_off0000fa37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 10864 bytes
SHA-256: 890a38cff2c86f7c2580d773f3339c9186d775f48889c0423c661ddd93117456

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