Malicious PDF — malware analysis report

Static analysis result for SHA-256 85dac297f083f118…

MALICIOUS

PDF

80.6 KB Created: 2021-09-13 03:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0e269069216f99c63c555068de808302 SHA-1: 4985697cd7b5d40dcd0cb3a30a86e1ba8a39fdcb SHA-256: 85dac297f083f1189cd40ee0d816855f752bc944a9289aff9258a7e6754f73fc
204 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript, which is often used to initiate malicious actions. The presence of heuristics indicating a password-protected archive lure and links to compromised CMS upload storage suggests the document is intended to trick the user into downloading a password-protected payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://tnhmc.com/userfiles/file/6303266369.pdf In PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/sisajokirugoxelufe.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/828b95a8b2f9eb4a73c98ad5f32c3236/tilikunonezobux.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/89490325371.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/1124711564.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/17799369785.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/11742366375.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/legomikiwiwubetexu.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/jawegabad.pdfIn PDF document text
    • http://innotack.com/userfiles/files/tebadilanisamud.pdfIn PDF document text
    • http://rooptex.com/uploads/47787837937.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/84865679787.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/zatewobakewomonovokujav.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/wivubirigelulupebaxe.pdfIn PDF document text
    • http://foxhill101.com/userimages/levesovawasad.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/xefixujumimigaj.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/xivezazi.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/ratisilisobobaxujitij.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/88271987362.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/viravoramexe.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/43720152568.pdfIn PDF document text
    • https://tadimtursu.com/image/files/44878919966.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349d72b1ac8---77821254653.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/suzokaw.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/bizudinivuzexi.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/kupikuturelapi.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/vabavuned.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=send+files+via+bluetooth+androidPDF link annotation
    • 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_off0000d761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD761 10832 bytes
SHA-256: 4d674aedf5112ee29387c7bc4fd01ff62ecb091cc0b3ae9ffa8a6684f08955b9
font_01_sfnt_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 17004 bytes
SHA-256: 2a5fba078cc54839af2dc3ad01fd9bf4c27454457e9551461e84e6a3a1c9a0c4

Open this report in the interactive analyzer, or submit your own file for analysis.