Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f3ed7346db701a…

MALICIOUS

PDF

85.6 KB Created: 2021-09-17 16:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5777a07f03b8ff710d9bf7d32989c341 SHA-1: 47cdd02f0bf1148713064a432271f6827f647992 SHA-256: 32f3ed7346db701a774234d29b9a843040ebd7de859cc3daca3a875a6e126fd5
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF's structure and link farm characteristics are consistent with techniques used to obscure malicious intent and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://rehahomecare.com/upload/editor/files/98835699752.pdf
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/rolaviweluxa.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/8e00fb36be5cfed7366c6df9c8bfa282/xagojolejisarovilobu.pdf
    • http://railwaysrailroads.com/upload_files/files/puxojojotoluso.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d62301168---17674594750.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/57f1f65a08272ecf8d5dbfb101129f17/67489315225.pdf
    • https://careersourcechipola.com/files/public/74336148878.pdf
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/22197517376.pdf
    • http://sm.ac.th/ckfinder/userfiles/files/80518701195.pdf
    • http://ttc-investco.com/img/files/rawaliloxibefuvojig.pdf
    • http://bushurov.ru/images/files/51063787704.pdf
    • http://www.gulbaharsigorta.com/contentData/file/11223457597.pdf
    • http://mybed.tw/uploads/files/202109130302408179.pdf
    • http://mebel-moscow.com/content/xuploadimages/file/litinigumasibodojum.pdf
    • https://1877painters.com/FCKeditor/file/xibenajewetifek.pdf
    • https://duproject.com/uploadEditor/files/90387022230.pdf
    • https://coop-alternatives.fr/images/images/zupaxusizedazenol.pdf
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/lapegetezirurumikin.pdf
    • http://chistogood.ru/admin/ckfinder/userfiles/files/72531555751.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16139445b835df---20322669770.pdf
    • http://0975811252cool.linker.tw/files/7251634333.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=android+sexuality+games
    • 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_off0000ebbe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBE 16792 bytes
font_01_sfnt_off000103d0.bin
cfc31918bd4d1dc35aabb3055a29d53225cb775b2827296d8a74c58d5bcb5fdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 17172 bytes
font_02_sfnt_off0001302e.bin
917db33d29ea696717451efe3174b78f7b382ee3447d944c8eb9210dc450b4e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1302E 10888 bytes