Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc8015a6d7023ea…

MALICIOUS

PDF

72.1 KB Created: 2021-10-01 07:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5abd8da969050f053f016d450e70053d SHA-1: 7b49c8e566e2db44fc121ac962113dd6bf783877 SHA-256: 7fc8015a6d7023ea46d49f3eecb2b2e8e92cfd242a87a0607553c085e09db7d8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=cricket+07+game+download+for+android PDF link annotation
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/b501242322c5d48425bb8d302ba7e388/xikikun.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/romitudiwekomurosotun.pdfPDF link annotation
    • http://szkolka-wiercioch.pl/files/file/pojukedidapanezulaja.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/25202928371.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210921075312.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/af79ba98acb0d53a6219cce6fd8fccef/71491852844.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/pavatiwosolezivebaxunorej.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/dumejojudojeluxu.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/50154904647.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/mejibagovisujopaju.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614541d611771---piratel.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/4655075477.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/50272812616.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/16362222124.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/zogugoxe.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c99c512c53---21983599512.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/11530058349.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/bukav.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/12443561843.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/kuperuf.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/dibubetotowuf.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/debakemamiwenanawosofesar.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/80392804551.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/27869575351.pdfIn PDF document text
    • http://bienbao.org/uploads/files/sufupiboru.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/d7c3dcd8803b97ed5df511cccbc64183/niwogapekovowimo.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/kosejeduliz.pdfIn PDF document text
    • http://kocarbon.vn/luutru/files/97073878461.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_off0000b51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51E 16344 bytes
SHA-256: a805f8798c485eb4eeb9e9f1b239ee89d01eb390edef43742211c950339030b5
font_01_sfnt_off0000def5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF5 11032 bytes
SHA-256: f92c6561a62cd0cad148e28550ba9852cbf921dbc5251173499cab8a86f4e9a9
font_02_sfnt_off0000f892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1