Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f23f8c05fef0474…

MALICIOUS

PDF

89.7 KB Created: 2021-08-10 09:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a298241a4d2d5009c0efee547b57352 SHA-1: 5f943d36eea1e3ae99c17d6cb6c40b6eabebe332 SHA-256: 9f23f8c05fef0474ee1b76dc5576cde6e88803cd6912bb444d99429dfa5f481f
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits malicious behavior by employing social engineering tactics to trick users into executing further malicious code. It contains multiple links to external resources, some of which are hosted on compromised CMS platforms, suggesting a distribution or staging mechanism. The document also includes lures related to clipboard commands and password-protected archives, indicating an attempt to bypass security measures and encourage user interaction for payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f4cb300d9---riperubekamewudadino.pdf
    • http://2rent.gr/userfiles/file/mivafovupenum.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/1d4740c9b283e1e682be4cf889eafaf9/sodatuwifa.pdf
    • http://savalis.ru/userfiles/file/guwukamomabidofupo.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/0207a79458af4b20c0b594d045113d19/24401969302.pdf
    • https://publicbridge.pl/userfiles/file/tadutot.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb646dc78d---raxonewi.pdf
    • http://jhferry.com/data/fckeditor/file///gurunudet.pdf
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/69528cd6dc880a3dde8c1df38603c0ea/zikabosezadebokikun.pdf
    • http://agendatourvietnam.com/hinhanh/file/29719743069.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a094d11ef---kimamiparumutevamawewa.pdf
    • https://trimix.bg/UserFiles/File/25418544012.pdf
    • https://ajitcoatings.com/uploads/zazemalejubiri.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ec7c5e32a---xumuninurudarijolevew.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/6992c92d518cb954014eac188b7b8c22/34997064756.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fc81bf252---xafufifexa.pdf
    • https://www.sterlingsez.com/ckfinder/userfiles/files/garavuduposewuzifuzetor.pdf
    • http://alexlunacoach.com/img/editor/file/20355580968.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/15ccb6a34d51b73c3634d77c355f03ef/29839866664.pdf
    • http://alwaysfavorentertainment.com/clients/879371/File/97435335829.pdf
    • https://cooperspick.com/files/26154637368.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e06775fe8---mabizofoguna.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611146fc06196---xixazibuzepidoroban.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mini+vci+j2534+driver+windows+10+64+bit+free+download
    • https://mega.nz/#F!wYYiQI
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f588.bin
dd9fe8de1e0f276d3b243eae68da50808f102e35f3ce0148c2bbf32b9e8486ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 17488 bytes
font_01_sfnt_off00012353.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12353 16792 bytes
font_02_sfnt_off00013b6a.bin
7c6aa9ea7157bcbf5d9826d5f940c29e58d4d997c3db61e995417d116e2815d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6A 11732 bytes