Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d214e1602a4f135…

MALICIOUS

PDF

82.8 KB Created: 2021-07-02 23:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f78db11651d26a0b1315b71ccdb2852b SHA-1: ed9cff595b2baa7764c71fa1e2d09c3fca4321e1 SHA-256: 5d214e1602a4f1350ad991341cfcebaf7f34205dccdac928882efc09cfa923e4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to malicious content or facilitate SEO manipulation. No scripts were extracted from this sample, but the presence of multiple external links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/1b88807ff9e81cf96797064e17fa16e4/fazowoturabujapapanosi.pdf In PDF document text
    • http://dailymaytrogiang.com/userfiles/files/40451339321.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/a5b78ca4a5b8547dc8275ff7def575d4/76847963669.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/eec327068ffaff61067ffafb72521842/66178661125.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f27d2a7bab---pulab.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/19b182d5d6728a8a7bb5c0c5ea45eb9a/rerijaperumapiviverez.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/26480852931.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/60723446795.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9480abf0d---naxufe.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cff447947---xisikesexofowizu.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/97132804012.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/d30a7c9eafd830fb84c1e34622c3b40a/nuvefi.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/31011004765.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c719db34763---tagepeg.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/gvqjte9qo40q34jl7r39134ou5/49531337066.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/bitufutimubex.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072866e51935---virisogofuwosemovatuxeb.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a696088965c---39466008029.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/j7767l70kd4gj3607i9imt3fdk/42912495287.pdfIn PDF document text
    • http://hnspkjx.com/d/files/fefejarafetarusuj.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/83f5p4fb8tnsmpln378tahc8rj/46622119037.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/g7ijofhapba7vuo593vnu9h8dc/84057292094.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/8b3b15991bfb0419b22f0af6932ee344/64963145919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=healthy+bmi+for+18+year+old+femalePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 10852 bytes
SHA-256: 1acf95d51af2fb53cce501540ff5f1620d7cb27f034a80627456576b821ce232
font_02_sfnt_off00010ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF9 16944 bytes
SHA-256: 8522645c4da5a64b231a5ff8456519cbfb210c6033670eb794dd737df93cc666

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