Malicious PDF — malware analysis report

Static analysis result for SHA-256 5009ce057d4221db…

MALICIOUS

PDF

82.7 KB Created: 2021-08-30 01:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fd2c7cf3ec8a9bc04801d4c871d1f0cb SHA-1: 45f3b48d960336bec6f6757f3dbf8d56da66ccbd SHA-256: 5009ce057d4221dbcec6e96a38e0f75a84e271e40c0263ee84f19773385a4a3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 http://inbjnews.com/data/cheditor/0603/files/81458093213.pdf In PDF document text
    • http://nowyhotelik.pl/userfiles/file/33359906170.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/6e9218p46i7016dlamnvq99468/33280513501.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/5d95db7c009ba82d3f551060f32d5dc9/dajus.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/24026892563.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/negokazol.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/2a125a001a46bf0bd04aa287aad11f07/gizimimudis.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/59294906746.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/b16a82551a303bd63a1621ed3fe9b0bc/dowawuxisazaxeketazi.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/kobijoxalaro.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/40608629360.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085b17bdfebe---rimorowanava.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfd3035d9d---faxidumazazemudemabar.pdfIn PDF document text
    • https://renhedc.com/uploads//files/202108030038419913.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/62609453935.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/83099634237.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/kaguxav.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ec0d4f09c0d7d8f68fa2eb286b82fccb/burazoxujawog.pdfIn PDF document text
    • http://sushi-belovo.ru/files/50816222721.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612bf73f8506d---xisojijitisu.pdfIn PDF document text
    • http://candientuvibra.com/images/file/desukamoj.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c93ca81a054---jenujidomubadozifogabu.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///zukukanakuwujowegesov.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/86592113828.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/76cc631abe184d30e6fe1b77bac89f8e/bawavuxanoz.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607be91062cc9---suturugoxeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=reading+coworking+spacePDF 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_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 10768 bytes
SHA-256: 0254f1a3cde8ccbd6ce99d7472cde312b077091b04679bd098432d728c821d8f
font_01_sfnt_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 17684 bytes
SHA-256: da46412f9aca210f3ade01caddcca38963d43a16f14481ea62b468bc86f8472c
font_02_sfnt_off0001247d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1