Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1772ffcfa8ee4a…

MALICIOUS

PDF

85.5 KB Created: 2021-06-30 16:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c37274b48ad70180caea7d2575ecade SHA-1: d87af810cdaf17effc6fffe1e1ff0475b70118b5 SHA-256: 2f1772ffcfa8ee4a9693b2328452652179b3142f14bb92dbe7ed3b177ef93082
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress installations and potentially 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 delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/4qs1l1v02u99ji6msqnp8oko42/63695554800.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10d426563d---90392414027.pdf
    • https://capital-tic.com/upload/ckfinder_temp/files/20210528051353.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/8a3976aad9ca04886e13c7393ce6fee3/62945748669.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/a405ca7ed410000884b17a8eb2e602c8/13308836065.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d815adda5d---84778323106.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/91pdsnbtdvebun809ctk24plmv/36256939528.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/c369c8fad1ec7584d87daa2e500f7b8d/23075759506.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/okugo25e8f0d5bcle3ih46sj2q/87519547039.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c54afadd939---kupojuv.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/ef2142cf7ed3d07bc9b3a6811207b619/50078073985.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16076d8dc557d5---rurudejozemedepar.pdf
    • https://wagaskar.com/media/naduwitisafe.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/petuwemugogiforovop.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/v8p4j2f9l9vu76ci940joj2ub8/23758622378.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773287ca8bf---21401921277.pdf
    • http://otvorene-srdce.sk/userfiles/file/legudepepu.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb557e59a98---rafobinizonege.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/vh7ts56ba2la9hbsq7v121dggc/27255364779.pdf
    • http://tai-yang.tw/taiyang/upload/file/88532148495.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/29643725652.pdf
    • http://blesk-stroy.ru/userfiles/files/14065798652.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebecd1968c---gusumazuxun.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/60792d0703f18edd65fe7272763f9855/96380173596.pdf
    • http://washchienluoc.com/upload/file/96592113844.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+medical+city+ambulatory+center+clark
    • 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_off0000eb46.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 16792 bytes
font_01_sfnt_off0001035d.bin
bc8f7e0b8c7244fe403865a74220cf6f71574795673c8d93a90b5ea20398a3e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 10876 bytes
font_02_sfnt_off00011c41.bin
a61eeeef0a725e931a3d1d7d958368e67d082137c5bcd399277ea10bd6e9e3a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C41 16988 bytes