Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf87954bb6687a49…

MALICIOUS

PDF

94.8 KB Created: 2021-06-28 08:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 57974961545226ee173fca40db7c7e7a SHA-1: 95c63d1422c39342e9796bbef14f138ca1de138c SHA-256: bf87954bb6687a49729d426a9ccfab1bee5d9e967ee79bef8c09171a80421765
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a lure related to payment redirection, strongly suggesting a phishing attempt. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate it's designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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.
  • 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://www.agenbenangbandung.net/file/95121489984.pdf In PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083dadc0b4f8---61709858589.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/0328b275f76c3596a4d184047b00e550/1641404780.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a7f394285---tebutubovu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbb8231adb---roroxavifewopeva.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/kajikajomekemesuzoboduk.pdfIn PDF document text
    • http://cloverdiamond.com/file/10551301387.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/mdq1ocbven8hcnt4jqvq56ougg/82212287228.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1621187621.pdfIn PDF document text
    • http://www.siposferenc.hu/html/98948766026.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/mhvnc06ulc4k9l0sc9s6a9im81/bitudurixofibofase.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb22fa1e76---60078180378.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/201abcc997a9285e4a6fd90df7771b30/70452690758.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/e5c41b9e32e616d1ac724963f5dc715d/nujanipabefemikapok.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/qhjdtccifjj4k8tmgroknldog3/37062455221.pdfIn PDF document text
    • http://haphadoor.com/upload/files/80051520748.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b929869f3e---49236234790.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210528013620.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/fbec995facb3df18f055892da6dd8ff7/56628127917.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/xewulekega.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/66c40b9b73e34884adfc6a17f896a8cd/fozomaxodijolugegibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=places+that+pay+for+scrap+metal+near+mePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11228 10768 bytes
SHA-256: a0d325f8ed94df8599d0d2e17492387a1cb4d86a9b22ae556b50f2421e6363be
font_01_sfnt_off00012ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E9 16528 bytes
SHA-256: d6e77625367791eba9390401ef88c1407059d060df52089fac55d5843a4517fc

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