Malicious PDF — malware analysis report

Static analysis result for SHA-256 217979e629af1d5c…

MALICIOUS

PDF

86.2 KB Created: 2021-07-20 02:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a262835dc0e346286d045823e4315e7f SHA-1: 1e2f7366f897b1ac3d27f7e73a8e067337649b0e SHA-256: 217979e629af1d5c29cfdf40f63cc3638dec1aab121c41471f26a9ecd5148c26
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d065f227d2---24476859724.pdf In PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072572f2a9ff---64251873233.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/lenapok.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/24350786046.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b43bc7237---78198181658.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/58184364087.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20216292051379236.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/zipirutusitafiterek.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b04cf953d77---tatodinoxubip.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/zisoxekonun.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/janaroleto.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/36843386814.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6b0027725---28904059306.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/mudomizedodimorabubujow.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/dodike.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7e703c301---ponawijirade.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/78192705301.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/ruzefujaxevow.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/94535836211.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01af89094---sasajusitov.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16079e0ddcee42---71479925602.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/40739534883ae707908fe4df42e6c8bc/79849243653.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160987d89afc13---84975641749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=multiple+documents+into+one+pdfPDF 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_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C0 10612 bytes
SHA-256: a3deb2ff93649cce993fb43c6ffab0940b2e43e84a680868dbb58efacca50003
font_02_sfnt_off00011ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF5 17172 bytes
SHA-256: 165a1e764c1f377a6044a8058c88b14717cb35d31f1121bc1aa4624f462bfdd0

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