Malicious PDF — malware analysis report

Static analysis result for SHA-256 300081cab911a429…

MALICIOUS

PDF

78.8 KB Created: 2021-08-17 08:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30bc37131798f2aa7a63b379c5dbfe93 SHA-1: 271158101f1190822e8b9992fc01b31acb979c0a SHA-256: 300081cab911a4291860877991ac59b330e521af3ed1ee54a86a73a72c2097f9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pngroup.pl/ckfinder/userfiles/files/viragomiriw.pdf
    • http://hutbephottaihaiphong24h.com/upload/files/69123120233.pdf
    • http://rainbowcaterers.in/userfiles/file/84002522540.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e3c5b9307---zimapojixubojogofuro.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/f63595dfc2ca3e5c159198b0baf8e86f/vudedozajufalaga.pdf
    • https://altonika.pro/files/fck/file/23496798258.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c18ec260d4b---fefagoruvapiniga.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/2eabc3dc854024bc37070c2666df59e0/89676376920.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/fa861b8a805fcf93962cfb1033a03dab/35289742414.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/34c3bd77846fd6a8f26f78d2ce8838ec/wekovijelalivoda.pdf
    • http://shesob.com/file/files/wogulapenetadepe.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160704f6d4a951---72700030882.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ad313ad366---notev.pdf
    • http://www.bufolari.com/public/immagini/file/wejijurowupekujik.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b72e5d6533.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/6571506aec8f6c565fae8ba016a9bcee/98999951792.pdf
    • https://www.passion-rnd.com/upfile/files/2021/06/17/sotebasonusaxebekiwu.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/50fa280dd2aeaaff57026c3efa512b18/72604447447.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16094bc9ce4f34---88754614587.pdf
    • http://yangs-ns.com/ckfinder/userfiles/files/20210612180108.pdf
    • https://malashealthcare.com/userfiles/files/jatidujewiruwudaxi.pdf
    • https://kaisar168.com/contents//files/44238707945.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ben+10+omniverse+2+game+download+for+android+dolphin+emulator
    • 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_off0000cd4b.bin
4993359cd00e8df44d433632987f5b0901fc2684fb7fe687519c550a59135824
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4B 11544 bytes
font_01_sfnt_off0000e867.bin
eb614e6c45103a2f43f25f4c25d447bb588024f2c6a99454fc8759e282ef69a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 16852 bytes
font_02_sfnt_off000114ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114AE 16792 bytes