Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c1f5287a01767a…

MALICIOUS

PDF

80.4 KB Created: 2021-08-31 19:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1979f4f0b6129103f96caca6abb258a9 SHA-1: f041c1f308acf12b2cf8c108098d08182b89a0d3 SHA-256: 27c1f5287a01767a9b18d14ac93dbfd9755534e9a5ecd7d8695cc0aa30c4dfb0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to disposable hosting or compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and extensive URL usage suggest it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2722

Heuristics 5

  • 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
  • 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://allytemp.ru/uplcv?utm_term=pasta+n+more+instructions PDF link annotation
    • http://studiophotosfashion.it/userfiles/files/wewupirirobukawi.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/7e3b81d97d4dd22ef25647028af35acc/65550834245.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/94355213422.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210730191114844.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/gelapibebetoriperoso.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/lezejaj.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/kobebipudadik.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/21695368051.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/zufapaga.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608072fdd54a0---lumifufekobobakajiwusawos.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28663e0a3e---rivibitu.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16123465b1a663---55480992123.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088046f30713---34831559524.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/4555c0b2c3434dc6564d2e59acbe6f4c/dototukadutigaxonipuvufex.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716d51e2e8d---xozafedina.pdfIn PDF document text
    • http://goldenrulelodge24.com/clients/860883/File/xezafabajake.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160894ddb39ae7---8087221239.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/dazugemax.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/54768630732.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/78723917614.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05f995e140---gujulurebunizezagu.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/nanojijewowategefup.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608075c578059---vulow.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/fd373592cbededa2553c220d49bfdec7/34167044886.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/402580317.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7d73689a5---belede.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 10448 bytes
SHA-256: 337a5e40aef490139f1ba077a5fc474a2775cefda8db0c7c1694a7f9cccda042
font_01_sfnt_off0001052b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052B 17944 bytes
SHA-256: 7032c85d306297c113c051e3e228baaa745b7222d1dba2088b37d37da1c29f83