Malicious PDF — malware analysis report

Static analysis result for SHA-256 007c88ecdc0de424…

MALICIOUS

PDF

89.7 KB Created: 2021-06-10 10:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 778534d977c9b9fa534ac0134f706e5b SHA-1: ce427df157ec8b63c6a919dc98e4c51e9eabdcce SHA-256: 007c88ecdc0de4249333446b2b066c161c680ebf94693357008d606180e37b68
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=2pac+so+much+pain+mp3+download PDF link annotation
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7d3d86af1---bopafezudezo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d859bd3050---26492069284.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafb346080---59746462822.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092284597b18---25492513679.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/rqtijonjbkvrsdcmtb6rliqan8/gixur.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608f85144de83---sesep.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdeaf49c5e---ruwibixatokazetepegitilab.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/leziduwagisez.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/biwibizemexawujalomusol.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e861be67b7---59899024985.pdfIn PDF document text
    • https://schmitz.cz/res/file/33861664560.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/bsm98j4lms5c7ljkkcgqfdn3eb/wotimavifetudogefiruf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bbc2a9906---kezegitolunigad.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/wemewewuputukax.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16081fae6edf62---13460376709.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609485257002b---zotonegujexajebi.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b577ee9c1fb---40790100709.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/cacc72c36b8bd1895911b48c5e95e320/gobol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE0 6872 bytes
SHA-256: bdeee27b6f3fdebd23c80054e871120672e89c494bfae03318cdcbf718eb61ef
font_01_sfnt_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 3016 bytes
SHA-256: 2342739a3b03ab38ed062e30ac7decd422b2308d15db4ad5abbfddf247d16add
font_02_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 5512 bytes
SHA-256: 5224137f371313c001c393938ad690afa44f2f5619b62cdaf469164b026abd51
font_03_sfnt_off0001094e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094E 5940 bytes
SHA-256: 4f456151601388b75ab64decba6a8a4281640292a039daef63c7e609e6272deb
font_04_sfnt_off00011b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5B 11444 bytes
SHA-256: 775944aceabfcc956c8318e9b7f58e94e94db545aecbe580a342ef5e56b37696
font_05_sfnt_off000141d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D5 16384 bytes
SHA-256: 06bbf21baae7376e1e66e3f1078744dcde8dcfaae7f73e85f405c4446b8e7f9a

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