Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2be017daccb0d37…

MALICIOUS

PDF

94.4 KB Created: 2021-07-08 11:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84dcd0f23083f867c39d0a21ceeea4e0 SHA-1: bac6abda3c11b39ebe2dbf86d8dc257b8a8920d2 SHA-256: e2be017daccb0d374d9412a8ba8325ab55399d93843e7aeabedcd28e83dd7382
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or further stages of an attack. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://phantasos.org/userfiles/file/4736069630.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adce249a285---denijulikakedotim.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cafba7b28---42424108721.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/tesavexofiguxe.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/0b002e9a82303d3501a62d53813369f5/suwinimuzodolofege.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d9acc78cf50---munamakorixalitagilet.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/gngtemr586gs87j5joq5nvucba/zowapozorewa.pdf
    • http://kapelski.pl/userfiles/file/galovubukavesisilimoburud.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/cjdln3akvhsvvgsll03hmbs4o4/77240620078.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6176f3633---64259315123.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e59b32048---lemikapagojapa.pdf
    • http://thebaileyfamilyreunion.com/clients/6/6f/6f45d7e5c9279c15d0bd3a3fa6949618/File/30602313193.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22d04ba314---49221077101.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec01cdf9c4---23059274340.pdf
    • http://animationcoach.com/userfiles/file/tiwufexosineranotakot.pdf
    • http://ddaengshop.com/ckupload/files/bizowes.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/2337bcdae4cfa2410b2ae2a82cafeb9c/77744478838.pdf
    • http://technocom.pl/editor/file/34856724582.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160cca33249020---90663102210.pdf
    • https://cosplay-expo.it/ckfinder/userfiles/files/84544693143.pdf
    • http://asfalon.com/__files/file/xizimibilapusufosoxafefu.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/jndgmv2a42p81760d5euij3qs0/83440942670.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160726dee78857---rumekilixuxifen.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915ae2aa6ee---53188964309.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4aec409e26---65817874065.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=simulation+questions+and+answers
    • 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_off0001107d.bin
04c25505a1e32a94e6ed4c87e8bff1a4cb0e267206f0bd0563e75789814f3eae
pdf-font-stream PDF embedded font (sfnt) at offset 0x1107D 16628 bytes
font_01_sfnt_off00013b98.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B98 16792 bytes
font_02_sfnt_off000153af.bin
8f020b93b8f782502de0960393bc530338076fd241e08b6047661abe1a135a05
pdf-font-stream PDF embedded font (sfnt) at offset 0x153AF 10816 bytes