Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fbad5e49807446…

MALICIOUS

PDF

77.4 KB Created: 2021-07-20 03:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d0a38671dff48c43086b59d1e055453 SHA-1: 39a3aa33da5c8313a1d75f2e8fea94bd2d16d075 SHA-256: 75fbad5e49807446c0fb3fd3ad3ba78a72098c4e853a049c56589c8ec6640002
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains malicious content or exploits. It functions as a link farm, presenting numerous URLs that point to various websites, some of which are hosted on compromised CMS upload directories. The presence of a 'download button' lure suggests an attempt to trick the user into clicking a link, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://softtox.com/new/userfiles/file/72650789792.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160d92e4189e24---57982081006.pdf
    • https://aquatrustfina.com/userfiles/file/39100007810.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/kqu8qr10cqm3861h146fs16es7/bevozoxejeru.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/nls67s907i3kdpefp300896j85/16980363868.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/107319251fb65d15703780eec2ef2b80/63021112996.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e27b6f0729c---xebivu.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e30c30542d6a5e36a86b83e5fe86078e/wobitiwupamasovotukofugaf.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef9871ce31---19672179321.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/31bc32b2bf91b495ed5700bfc2b35546/lezolapiwexenazipoku.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/ganewamami.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b222fb841f---75024656762.pdf
    • http://laconchigliacasevacanze.it/userfiles/files/vabagobejivekite.pdf
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/63189481865.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/nk0thegde4vd8dlgmloji304p5/bikevokofiniwupo.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a80354d7ab1---92683552.pdf
    • http://reversetheclocknow.com/ckfinder/userfiles/files/14542160455.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/75e716c2c4a0ee3811ff15db885d5d98/6517993072.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/ab746b69d08009d595e64f16c9781db7/72548967872.pdf
    • https://brothers-music.com/ckfinder/userfiles/files/xokigu.pdf
    • http://boldogelet.hu/media/medovemasiwuzunes.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/19fa7ce107bf3327607cc14405da5001/52142631880.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da83f46225---fivakolibosajeku.pdf
    • http://2446665a.ru/ckfinder/userfiles/files/loxakulidotifo.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a6e12ad3efed59eedf77edce3d3e38ba/18940332991.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=class+10+physical+science+book+pdf+download
    • 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_off0000cb37.bin
86fb6410c60ee9147b25a0f202045fbc019664548a57a1fe86e1d20d51c2eced
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB37 16528 bytes
font_01_sfnt_off0000f61e.bin
bd9f0565512f15ba6f560be9a5a4ad87260ff2cc7ec613efe1f88bad102cbe78
pdf-font-stream PDF embedded font (sfnt) at offset 0xF61E 11156 bytes
font_02_sfnt_off00011006.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11006 16792 bytes