Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ec17c9f4e1ace0…

MALICIOUS

PDF

85.1 KB Created: 2021-09-14 21:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aa0a276c814040197dc2611cc9b5999d SHA-1: 64be0d3e9b1393ac03acdf1e19c3b3f29e9a806e SHA-256: 29ec17c9f4e1ace092e446a60f3cec4fe5d74c6e4bcee0ca218f80d49b0c2400
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, some pointing to compromised WordPress upload storage, suggesting it's designed to deliver a malicious payload or redirect the user to a phishing site. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is likely a pretext for social engineering, aiming to trick the user into a phone call for fraudulent purposes. ClamAV also detected this as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://ketchas.ru/uplcv?utm_term=last+day+on+earth+money+mod PDF link annotation
    • http://idolyokocho.com/js/ckfinder/userfiles/files/fuzeg.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/50755433649.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109122305376806.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xunilulunanadisitopirared.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021090308235416.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/davozesimalimodinolafa.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/zibesuxasisesubanike.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///tokisenudenobototun.pdfIn PDF document text
    • http://usagimatur.com/files/others/49586228884.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/14710195841.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/leliwisikov.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/73476659318.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/wajatesefokivizusofemepi.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/67040847321.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///lopokajovesepo.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613eed4bd7dfd---jowibex.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/kobobakirizom.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/d6e4d90cd77f7b76a697e9f5eb9d59ab/wigokofape.pdfIn PDF document text
    • https://simorgh.it/uploads/file/98154759842.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/af0e2ec823d7371da6beffb9959bf653/43341069755.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/xarikokugelakivo.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/71090137261.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/wuzowuxe.pdfIn PDF document text
    • 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_off0000e9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 17280 bytes
SHA-256: 9bbeb56d2a3574fb453430e2f4873197fe9e7ca804bb034121a6ed06a5dd1b11
font_02_sfnt_off00012edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDC 10448 bytes
SHA-256: ae880d66e0ad84d3810ab9c03a9696a4fbc3c3d0c69f19f9c686fc36c0ed3621

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