Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc7942d4d7296a3…

MALICIOUS

PDF

76.8 KB Created: 2021-09-02 22:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d892bbc7a812e33cabc0e8db7434ab0a SHA-1: 2b999b06921600214b147fec845523bb03f951e4 SHA-256: bcc7942d4d7296a39f92ace4493c49c50f18f74aa238ba42450fc89640575899
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure itself is leveraged to host these links, which is a common tactic for initial access via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=paris+trains+map+pdf PDF link annotation
    • http://blgjad.com/upload/files/9274574345.pdfIn PDF document text
    • http://splogservice.ru/content/file/82516433450.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/kokebafanexoxugubowafuzo.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/cjsnh3k9jpf1tfintpq3jk9nm4/dadewavogap.pdfIn PDF document text
    • https://wagaskar.com/media/84045101517.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/32vevdkavfm029m0ca1v8olvj2/7746009885.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161053c5771f2b---kidavupekawomaxubeja.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104a7351544f---tepetapikifepawa.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/76511915192.pdfIn PDF document text
    • http://grabnerestriche.at/lobejedusup.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/lifemivomuwaledepa.pdfIn PDF document text
    • http://ufcnagykanizsa.hu/userfiles/file/76796211633.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611efb3b65435---bugojituwerenosukufat.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/gijimajoparumabaxonitumon.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160832c0443f55---powabururazefakotupe.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e1ee67af807c8ae0f40629c9febd83a2/pimudirokafeledo.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/c2st25degiip1dmudi2qredsd1/71107869118.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aabc37f0590---69869940717.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/bdb5819a547bd88305559a7cbdf0db96/misaselisunizo.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/3584763969.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/kedoniwulanapokad.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/74245359143.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/3fcpp3llacj9debdh30gmjs6ag/xirezalovotiguj.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_off0000c72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72B 10360 bytes
SHA-256: e66c63c80a1a5a9172ea44c4d8733687af6f887fc6227bde25a073acf4f940b5
font_01_sfnt_off0000de77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE77 18296 bytes
SHA-256: f7f069327bc16c8075e464f099c0d58062547724c4b6a065c8a8508957a8362a
font_02_sfnt_off00010dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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