Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfe48e131603d1d…

MALICIOUS

PDF

89.3 KB Created: 2021-07-23 11:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de7facd0f4e053d0754f0154a61a896f SHA-1: 0abef1bc96d44f1cd62220cfc83f9eed369c7153 SHA-256: 1dfe48e131603d1d064a50bd8ada14de4609c7c507b70cb99b179bd301ef5128
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic findings and URL analysis point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://oppedisanorobertosrl.com/userfiles/files/73236771070.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/f6660dbaef90c24297ca32f152c15023/76623353756.pdf
    • https://aarhuskortet.dk/images/file/97583020176.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/b73c0731b504a2e035e2594ba4c22b1c/15859327681.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/wodar.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/6581g8h9e09grc6kgk52fmdado/lenanidak.pdf
    • https://metal-et-verre.ch/ckfinder/userfiles/files/rabegimusurepurinuwemoluw.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/ledazitigozukub.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c8fd1b53f---1278688522.pdf
    • https://turismopontevedra.com/ckfinder/userfiles/files/xedusunevetizisiru.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094413d25e3b---35319563819.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/98fdc5b9b192c82f792b9f4bddc86410/wimudululavatusanalam.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fc3724710---38448768319.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/qtv7b1rfl4q5a5aba7scntf3k0/refelunexoxopomepavinuk.pdf
    • http://chronocertif.com/userfiles/file/ninitezofoxidenemuxoveku.pdf
    • https://elearning-chemistry.ro/userfiles/file/maruvuvanetagorojemebale.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d9742f829---39215032800.pdf
    • http://tasteofruraleurope.eu/upload/File/64253721878.pdf
    • http://davidhammerstein.org/userfiles/file/66104023860.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/7vbb7p44ruf75emosrv4gun4ka/18282233157.pdf
    • http://iehyun.com/editorupload/file/wepujiwo.pdf
    • https://namhunglogistic.vn/site/files/xakaminuxere.pdf
    • http://progfin.pl/userfiles/file/61796873824.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a21658eca418d988be8217fa5a7b725c/27756981912.pdf
    • http://iehyun.com/editorupload/file/89646029872.pdf
    • http://sva-jeanroze.com/xmedia/file/jatidelomibedawolonufow.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tum+to+thehre+pardesi+new+song+2019+mp3+download
    • 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_off0000f589.bin
b69903450b923a278c36b3eb3a6bc3b6b3cc809125cde46d7f70da77036efa2e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 17096 bytes
font_01_sfnt_off0001225b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1225B 16792 bytes
font_02_sfnt_off00013a72.bin
891de02f8c8fa17cca5913adfb6fb5549003c6807084ad0d60dfe1260bb43c33
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A72 11624 bytes