Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2f80f761b20182…

MALICIOUS

PDF

87.9 KB Created: 2021-09-18 06:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d3a1fc7f1774ff20ad0cb6db21cb549 SHA-1: 52fc33164384ff09b9ce41cff6ff8f525d2cd72e SHA-256: 1c2f80f761b2018222556d82d6d7df31fbddb4f58e31c7865422c2f552495433
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and multiple external links, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are new or changed banking instructions, a common tactic in Business Email Compromise (BEC) attacks. The embedded JavaScript likely facilitates the redirection to malicious sites or the execution of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://sovaimm.it/userfiles/files/lekepubiwi.pdf
    • http://sola-brothers.com/userfiles/file/pisekutezubojavazer.pdf
    • https://educationindiajournal.org/ckfinder/userfiles/files/bezoxo.pdf
    • http://daehnfeldt.com/userfiles/file/74366274046.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9a011637a5f592b88a1112929ec0cc30/75414189883.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d89e8c3183---ganudojemekokurozugix.pdf
    • http://stillincontact.com/images/mails/file/73002559498.pdf
    • http://fortwashington.abwingsmd.com/uploads/files/fuxajafesepazila.pdf
    • https://asiarsolutions.com/userfiles/file/52026368442.pdf
    • http://sushimura1.com/uploads/files/fawataguwisob.pdf
    • http://scuderia512.com/js/upload/files/49092235356.pdf
    • http://nessie-vinylcare.com/file/kagizoniko.pdf
    • https://mamo-tato.ro/userfiles/file/82428086724.pdf
    • http://debseven.net/UserFiles/File/3434122682.pdf
    • http://ieeepes-thailand.org/app/webroot/files/files/94832242443.pdf
    • https://indiachristian.org/uploads/files/mafalirujamixesoruzixana.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134de8b94b20---guwexetezaridukefewep.pdf
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72372964389.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161331ad817170---98129627989.pdf
    • http://farmaciafasolis.eu/userfiles/files/87014998385.pdf
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/11007576508.pdf
    • http://espokebar.com/uploads/files/lofobijisojabomi.pdf
    • http://kingsauto-bar.com/js/upload/files/2090199426.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613396526413b---7283278313.pdf
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/jomawejatude.pdf
    • http://flomojapan.com/upload/files/ketanezejefiwifugi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=office+365+smtp+mail+server
    • 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_off0000f152.bin
265142121f7349ff181512880a35f5b647a526583b1121dac4326124620ad6a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 17692 bytes
font_01_sfnt_off00011fc1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC1 16792 bytes
font_02_sfnt_off000137d8.bin
673aaf166033b03d874a1a68bf18afcc180d4607732d25671f0252d39ce696e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x137D8 10984 bytes