Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d985163371ec035…

MALICIOUS

PDF

93.3 KB Created: 2021-06-28 02:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c135eb6be73daadf28513f98a8d999f8 SHA-1: 1a9d7012217ff6bb4d3ebfcf12a4301b4361bd00 SHA-256: 2d985163371ec03533ceedf430ff5868df56e278856d559cb19156f5d45b02cf
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of multiple external URIs and link farm characteristics suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://ugrctrani.it/userfiles/files/66846958699.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/aad0c75ce482ae761ee69ec8cc6bfbc0/xabuvetezazutawa.pdf
    • http://thaimassagemodel.com/ckfinder/userfiles/files/11324386545.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/f431bbaebe38ebe9eb24cd6c7ce97263/kakobopomexomeka.pdf
    • https://soudurelauziere.com/upload/editor/file/62556576970.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/d768f1d22cd983e0914db31562ce56d7/14436616231.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/d5705262a798f29d88fcfa068b08c940/25330704863.pdf
    • http://szentdorottyapatika.hu/files/6122612395.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e47b332280---54338252084.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/36c894d2529be49600c7a621b426aa6d/xulebirusigewilesu.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a4d035bf3---vunexa.pdf
    • http://startmatbaa.com/userfiles/file/80678939439.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16080434fe56e4---joforeragu.pdf
    • https://cvsc.co/userfiles/file/36609673579.pdf
    • https://tempegaring.com/contents//files/35059715402.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883a61ea36e---besoxiliz.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/ffe08e6f4a165bf1e189ea669e6aa51b/69889384830.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/1783cfbbe11b383372ca8080bd931800/69736680746.pdf
    • http://colegiosantarosa.com/uploads/imagem/file/zisutasexib.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/mc9d1vtjg0d3app864efjtvqa5/78368815055.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/a87c14f557314d71b2898d2498f3566d/1903203777.pdf
    • http://blissworldbeauty.com/newerac2c/userfiles/file/93962725391.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+revival+of+the+religious+sciences+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e982.bin
e5c46d072395edf64bb56b1dde3aacf5582ac72b008590c53b186905307183c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 11028 bytes
font_01_sfnt_off000102f1.bin
28e51e1e4e8369837a5a83c8d3804333e91696d3c50b374ca8c17721b712da5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 18732 bytes
font_02_sfnt_off00013366.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13366 16792 bytes
font_03_sfnt_off00014b77.bin
37d1bede086d9ec7680e9ff8f43b78da9a186ba4181e320cb99c5a42b30e3e0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B77 17408 bytes