Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8940b21f5677d0…

MALICIOUS

PDF

92.1 KB Created: 2021-09-06 14:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8ac63dd504ce48dfde4397a5e3dd0228 SHA-1: 2f7375648bac96108572d9378f1a397aed1ffc88 SHA-256: fe8940b21f5677d021e55e143e8d28b8feec55e9475efe950073c9498ca39816
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing attempt. It contains multiple links to external websites, some of which are hosted on compromised CMS platforms, and impersonates the Facebook brand to lure users into clicking a malicious URL. The document's structure suggests it's a link farm designed to redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://ketchas.ru/uplcv?utm_term=amcrest+prohd+1080p+wifi+manual.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=amcrest+prohd+1080p+wifi+manual PDF link annotation
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/55e3298a80e783a54490589ca0dc1c9a/xasolavusewomozape.pdfIn PDF document text
    • http://fitviewer.biz/files/file/buxukibarokoxevikorufijog.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606faba91a613---19318001279.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/pazojuvafaluziv.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/5b9d323f5c64e95861f0e96c7e6b03dd/54493748334.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/varigavoviwixadisiw.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/djpfavfi5kv56qmlififtd12s0/muliworiminapu.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/04b5e3c956a3234c25b0467e8804a8d5/45897022999.pdfIn PDF document text
    • http://www.celso.org/download/10530719848.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160879b9151256---zuxaleparesatuzomurugiw.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b17e7486ef---14030320991.pdfIn PDF document text
    • https://otterdisplay.com/userfiles/file/wajefoxi.pdfIn PDF document text
    • https://etimes.mn/uploads/files/65316885848.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/44847663084.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16096fd697f5e6---9589410802.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/kibutufudujojemodinirukef.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/33163316162.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160975ae452059---xirufugeziw.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/51266437585.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/62634840407.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_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 11432 bytes
SHA-256: 02a5848d7fdf29063e2b2742745254080facfe004f453a9f980dd046453ab8d2
font_01_sfnt_off000118ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FE 19580 bytes
SHA-256: 231fa20b00192d887f4c96ea0ac277fb97b4aac27539e367da2ad5714f6f1b8f

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