Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6fe84653260b93…

MALICIOUS

PDF

68.0 KB Created: 2021-09-02 15:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6d3ae6ee20dcaa004e5cc2f2dfa573a9 SHA-1: aa3b740bc6399d5eb706fda213140bded0200642 SHA-256: 3c6fe84653260b93bfce2938e3035c845a26ee4a7366dee72b29a789e9292007
176 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to trick users into clicking an embedded link. The numerous external URIs point to compromised CMS uploads, suggesting a distribution mechanism for further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160755c8e52aa4---bapux.pdf In PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/34f6311cd6b30eb56a867f4d645a8a36/89112243092.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/besedaxopawimolikewovodo.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/tukonodeporekosiridog.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b60eecd77f4---5587769194.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/teviwu.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/41089778842.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/kuxanetarawudakipurexusav.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/a3fd30162fe20a2f46dd2efca8896e29/74357859589.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16115a9a1cf568---nixul.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/0e3f92aa4fe5e22b1b88b999db7bf68c/42336003751.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/b7ri16il65aelaevj2c6qpif9q/nenuwivabowimejegiboxa.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/17626321681.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/24174994231.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/mumakitira.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe312d31d1---putulufunagebipeluxawej.pdfIn PDF document text
    • http://womenwhorockarkansas.com/clients/4/4c/4cfcdabbb7b8ad81bafe9a4295858145/File/49942118344.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/liriwopomajurenevites.pdfIn PDF document text
    • http://www.klccpa.com/userfiles/file/In PDF document text
    • https://cape-electronics.com/media/file/46867445054.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097abe431866---47248884964.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/a4a1ff1cebc9a4172440e90d0d01248c/bitebegasulopilunopupiwiv.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/49080495675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=multiple+ppt+to+pdf+converter+onlinePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06D 10444 bytes
SHA-256: 1633fc3c1a6032ef19e438d93647350daff7f2581a5883fd2039fd4c0024bbb2
font_01_sfnt_off0000c830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC830 14004 bytes
SHA-256: 8e2f0d443b4f356ed29b80f26649c6067741ec584bfafca8836747f86df8979e
font_02_sfnt_off0000ea82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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