Malicious PDF — malware analysis report

Static analysis result for SHA-256 1452a39e5f4d5e05…

MALICIOUS

PDF

85.4 KB Created: 2021-07-04 04:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c82598a5a9190727c664552af54c04b2 SHA-1: 14bc6cb921125990ab5dff3b40119e7c9fb1170a SHA-256: 1452a39e5f4d5e0559a5a1f144fcca8e8ee66987e6bfa3c5c1950edf1ad643be
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, with numerous URLs pointing to compromised WordPress sites. These links are likely intended to lure users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a566991ef310cce03d0660299e899750/leputisajuwarim.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/9b49840edbbc2ed1976199d9975a05ce/42140221504.pdf
    • https://egyptsuntours.com/userfiles/files/67568060483.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609145bc39c28---51819683826.pdf
    • http://amuseonline.com/absite/userfiles/file/84229022661.pdf
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/71335005130.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7fb909a78---78863830265.pdf
    • http://venusland.vn/app/webroot/img/files/3429402914.pdf
    • https://thefertilizerequipment.com/d/files/23527550240.pdf
    • https://footballsod.com/images/ck-uploads/files/fukuleferijitasokoka.pdf
    • http://beerskiboot.com/img/upload/file/nefokigazowex.pdf
    • https://mattress-leader.com/media/zenodiwezidemojixilewor.pdf
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/kilafenefo.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160987b5d7d64c---defononotonozen.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210523174823.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/e3l15hfbanob1fia864torab76/90544653123.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160cdadc09149f---posovezezogo.pdf
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/11832045022.pdf
    • https://ildiko-szepsegszalon.hu/userfiles/file/52067084771.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5b36a6f7fe39ba1c8aa5f00d523d7bd8/devuw.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160919b1f0d1c3---mufuditud.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a8d7e09424a0d6c6249e6313c37d6ac9/welujabife.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=lateral+sacrum+x+ray
    • https://medlineplus.gov/xrays.html
    • 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_off0000ef2a.bin
901b264dea598bdc8b39fc1d585d581710906bfe3743d145ee4ea92948105402
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2A 16256 bytes
font_01_sfnt_off0001192e.bin
73228a27ecef63990c0c2072cd52774751ac7d702a89b34b04abedd952a42fbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1192E 10348 bytes
font_02_sfnt_off000130af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130AF 16792 bytes