Malicious PDF — malware analysis report

Static analysis result for SHA-256 119d9fa431aa4939…

MALICIOUS

PDF

86.9 KB Created: 2021-07-05 00:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2cfbe60355ebc45fb626ceb45ddd7723 SHA-1: 7ddf32dfdb292a54fb089ae3abf3e0eb1bb370e5 SHA-256: 119d9fa431aa49397c1446315e127a84e0e6e0e46cfe938dba1f975db1451e4f
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of UTM parameters in some URLs point towards a coordinated effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vmc3qhf9i2qfbos4rlqmo56179/pifewagiwez.pdf In PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/5s09du5d4kjglps7efh84e5uh9/rijosid.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957873a74a9---norud.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210702223452.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16085b472ac61d---jobanupatavan.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160827d064a15f---92095588924.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/34528700059.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/b71187d0c6163654c4a628d69ebc858f/zutaluwakukud.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/josejaxe.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/rinuguwubamulosan.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/5831006627.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb843645b7---wixuleponovulefoperu.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/lotapeza.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8888eb3438---7744156725.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd668ab180---6745526693.pdfIn PDF document text
    • https://irantruck.ir/data/file/jurugupeganajanunoxinevor.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d5ecae327---38753073511.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/30283869058.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/37451635899.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160783f25a09bc---vizepojenawepawemikubo.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ffe314894---80396263139.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/19240584506.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/sigasatufagogi.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/b17a0df16c3918c5501c7824a43b050a/zokidaxexuxoxasewokusur.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/kuxixaxinewuxibir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=resignation+letter+simple+and+short+formatPDF 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_off0000ed32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10544 17572 bytes
SHA-256: 70ce23f4ec589f8d4e300ef61d9d8992d2695e9d802d37e82a746a36236114af
font_02_sfnt_off00013310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13310 10992 bytes
SHA-256: d119d9c50e3aad92a47e9c709affd88df6f3bd1f66532708fe952fa615633ae0