Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd98039c366996e1…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 00:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c00013c6a1200ba05345498f31d1500 SHA-1: 0efb744cea51ffed41cc63715001d5b29df68020 SHA-256: cd98039c366996e1805c7bc0b28eb8392e86ca7d9705782f240308bae2eda7af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites, including a WordPress upload storage. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ceccarbotosani.ro/userfiles/file/xuzoporulusugedoda.pdf
    • https://xuantruongtech.com/images/ckeditor/files/68618277935.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3b997be43cf2a92eaab48b866094dfb9/77562035490.pdf
    • http://cosmic-kino.ru/sadm_files/50025019810.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/3667db923acedacb75d1b6ad7ed17087/fowukavexazutubotu.pdf
    • http://adria-ex.com/99547062906.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6bb9e7804c90f3cbfcedf6309fbf68c0/jodizalanizibutuvan.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608255454eb92---66476744644.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16083b37dd74d7---sumelunezituruwitasamuxej.pdf
    • https://hzautomatisering.nl/userfiles/file/5475303759.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/181fe402284641482a2790800f6c1757/wokozalejirolagufitu.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2881a8e87---9902955860.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160896c0d0cec2---lizamusudeputulu.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed3336ee7b---58835806656.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/osomphmd2ev7ftjp56ll2v6j7i/wusanon.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/032bbc9010225d5264d7137364f887ab/vosukebifexadawadedevijuk.pdf
    • http://sbstroy53.ru/img/files/60460140043.pdf
    • http://lukasikgroup.pl/Image/files/fitusobujurizizut.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160a407c88ba8f---wotabopavovofepajimopago.pdf
    • http://bioident.pl/photos_fck/file/juwuzulire.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607c0c05e3d44---rusinimopisiserodofapire.pdf
    • https://bombapin.com/calisma2/files/uploads/mebebarigulisow.pdf
    • http://cck-brno.cz/ckfinder/userfiles/files/18548673996.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/22f00e30da2a2f365af0eca5966cdda1/20716419977.pdf
    • http://ash-graphy.com/userfiles/file/43567982003.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=phytates+in+beans
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb77.bin
d3158d7b44ec9c6982898c01fc92ea571e01370988e564b994bffd449fa36012
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 17400 bytes
font_01_sfnt_off000118cc.bin
07977a6d27762005a110d3ee79eae49a99cd4b32ccc3aecf706f43edaf833a1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x118CC 10196 bytes
font_02_sfnt_off00012fa6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA6 16792 bytes