Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd97591034e65412…

MALICIOUS

PDF

84.8 KB Created: 2021-09-07 10:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40224d7d600c315893772615ba52459e SHA-1: 3bcf666c36bfff52d74dbb0c9a3363dfc982c8d3 SHA-256: bd97591034e65412e3e29354a52be77bc8b1b436bd96beffb4ffaf6399621326
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple websites, many of which are hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external URIs and link farm heuristics supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://kiaavcilar.com/upload/ckfinder/files/zekagogigiponidodijelog.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/d2002ce78deeaf1edd1fc425307a51ec/feluzunizajativit.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/3d0faca28fc0858614daab3c7f167e0f/29961092357.pdf
    • http://jikaramen.com/uploads/files/83250739607.pdf
    • https://wfbulgaria.com/uploads/wysiwyg/files/luvibupa.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080904251801---41124299809.pdf
    • https://digireg.cz/upload/16084198409.pdf
    • https://rajaketiga.com/contents/files/pelarupinofegexifalim.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/18438434209.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16086c7009ea68---bazepadog.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/rt72tl00aq4k2004uqaar8vin2/kimodoxezit.pdf
    • https://nasikampung.info/contents//files/sututetopafumosesegaxi.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d7f8c81c4024b89ba2492cf039b1bdd7/pofaviv.pdf
    • http://avvolodin.ru/upload/file/nirizugunutulupeba.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70ee3aa021---21939374009.pdf
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/zuzowuvokigin.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/69b0a2c1113624261e8fcdabce2ac975/82583409393.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d412223afbb1a774900962cd58d267ac/lilad.pdf
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/wixifiku.pdf
    • https://momsgardenfoods.com/ckfinder/userfiles/files/gijupinigivo.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16102facda9947---wulivawofemefewexekoda.pdf
    • http://mgocsm.in/userfiles/file/lewejasape.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28863793f2---sadidepexixaju.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/7c6b75e8e6d4f543bc578cba5ac9b1a2/52836629122.pdf
    • https://aimara-bg.com/userfiles/file/nasaxatewar.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=romeo+and+juliet+piano+sheet+music+pdf
    • 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_off0000e37e.bin
f6093c41eb98fc9e208e402e1e7d1b8006ef79c30d4a7c4e1a928e0f0d5cbb99
pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 18164 bytes
font_01_sfnt_off000113fd.bin
9f4696ef910ac92d4393eb3a94740dce13e9ad3910b47e2e1ad55f370d4a1c93
pdf-font-stream PDF embedded font (sfnt) at offset 0x113FD 11060 bytes
font_02_sfnt_off00012d7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7C 16792 bytes