Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d9c87353b7ec3b…

MALICIOUS

PDF

101.2 KB Created: 2021-06-27 04:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cd28fc449c309247376e4e63951ed06f SHA-1: f1e2041bb22132b27de0caf63b7b13b50ca71dc9 SHA-256: e7d9c87353b7ec3b81c8cd1063583790e41c99314448429762b68db6e8fb7384
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ipsgroupjjn.org/userfiles/file/80583778917.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fba2b7535---bamunixisawuw.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/44daad1e7a54c599f256002e5bfdaf96/fisabi.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098d35ff170c---wafikakefifuwojetab.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/pefaxofukeninivukox.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/lupurazodu.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/62b2c109af7715ad2ab7351296ca1acb/rarafalapeliz.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c5b35d616c6451f947097b33c2fc80fb/16250305107.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/wegumopetizizadazobotanop.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/detufororanujulog.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/tebojisilomavunu.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/e61n2s90l5m1dicri38mra6es2/85669694911.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/67911712753.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160afd4d740077---49936807392.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c15c09148---nodupuxedul.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/xejakebitabifi.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad86872d93---gikerutabomarezinamifekov.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607991d257f16---99297406228.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/7efb3b675450a7cf6d36fb1ccd2cd511/lifeb.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/17de72afc32c604e2fc11e7b22a4f0c4/xobusopepuzimonifusolude.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/1a7af141928943006617dce8e49ba43c/sarivi.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/folusaroso.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/dc68622369c73621702171ab0e526f1f/sutalijubuxelebamumewixux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=good+morning+message+to+a+manPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11590 10584 bytes
SHA-256: bb9b6fd94238b159fdf65c3e68b3bf48c7f6da7b8430b0ea7330402da53f49cd
font_01_sfnt_off00012d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7F 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_02_sfnt_off00014386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14386 16824 bytes
SHA-256: a7f9312ed817a112a86784e82b7ac98c51918526fb39fa29ae86318d8ad03610
font_03_sfnt_off00016ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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