Malicious PDF — malware analysis report

Static analysis result for SHA-256 d982be35e61d040e…

MALICIOUS

PDF

77.1 KB Created: 2021-09-06 02:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a3fd97bb73d6f108e97705fc7909ef59 SHA-1: 8a57724bc76dd10708d13528d020d29b0b58eff6 SHA-256: d982be35e61d040e5a63d311038d589e5ddec3c105009aac13f8d7b178598e0e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, forming a link farm. These links likely serve as redirects to phishing pages or malware download sites. The PDF's structure and embedded links suggest it's designed to lure users into clicking malicious URLs, a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://huntic.ru/uplcv?utm_term=nj+dmv+practice+test+in+spanish+pdf PDF link annotation
    • https://anmoul.com/userfiles/file/86359126028.pdfIn PDF document text
    • http://regmac.net/userfiles/files/mufat.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/14821250498.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/43875869380.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa30a0990---dinunuvivifokogupiruwovu.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/97163038605.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/2e0492409da24a92d2a5c5fdc3bc13cf/rafitefojemo.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/loxosojijoju.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/jekozivibelesesutir.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/52401745045.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210807134402.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16118b84ecff96---giwudegexebuwef.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/49773ae4fe34cee4b83d1b68601e9b9b/18525848071.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/fedilolizizovugojavatu.pdfIn PDF document text
    • http://kgmda.com/upload/files/lagudowewu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a1ef61b8b---kinigadomegotevoviwaga.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/61335109077.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/matuw.pdfIn PDF document text
    • http://clinicaveterinariacittadivignola.com/userfiles/files/biwafijonitufofuz.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a8a7da81e---38720176894.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/gonuxeripimobikapeboxod.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/90899591410.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_off0000c0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BE 17356 bytes
SHA-256: 51587ef65a470dc3d2e70d1aa957413db91f77d95d05d0303c3af03b4ea1a074
font_01_sfnt_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 13364 bytes
SHA-256: 95ee4728419a8d821661ec48db8f6328920442b6c45fe6aabbd75393c7ccfabf

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