Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee432dbc3494b80…

MALICIOUS

PDF

68.9 KB Created: 2021-05-10 00:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 980929d0e386f492e6c5051f0618ff40 SHA-1: ae471684e31ab4cad3e51903e9ff0971e2c546d2 SHA-256: 0ee432dbc3494b807622086d380d2467108f1923ec8c5bdb8480ce3784cf28cd
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/uplcv?utm_term=krispy+kreme+fundraiser+flyer+template
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160764c40bbc62---repug.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee21969738---66917237603.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/a6e6bbaead3c0449faa6110c461d9b95/73341569793.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e616704c4---mivizigunuvanuvexiriza.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789e7447cd1---44052953764.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/o2amhh4bdo0mml95gfbi6avh65/podufi.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8cq5u72fp9di6g029gphsac4o4/gikivatodugunawo.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077741689b16---judomelozagekovale.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/bdc10c06f495361931524001f4020492/pawawusewove.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/4a5c502eb22038a01bf84e6a09e9fdcc/jigopupini.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d019f2a868---fadujotapakololujadizu.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840ae558c7f---foxubulozofaluzixerala.pdf
    • https://parklanehotel.asia/userfiles/file/88982893678.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/9029ace5b27ce9795b080f2101546fea/30604802672.pdf
    • http://alnoorcity.com/userfiles/file/kixagefebebigi.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160868110d15e1---zoladaneva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d198.bin
d631cf55546471c48bab2d6b1925683b122cb093dd172606e8a14105597aec2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD198 5324 bytes
font_01_sfnt_off0000e3a8.bin
7b5f15f62c91e71c2c5bf17522b7103bd0196ee41fa231506c212bcb1d4384e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 10264 bytes

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