Malicious PDF — malware analysis report

Static analysis result for SHA-256 937d4d6ac03a6ecf…

MALICIOUS

PDF

73.7 KB Created: 2021-05-30 20:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baf8f9ee5576d0004da7432c24581566 SHA-1: d70d6dd322b1c50e4bf1ddfa1bc87193c6554198 SHA-256: 937d4d6ac03a6ecfdf45adbef8a8620d35a7ff6caccb8c6d56c9c24ead320aee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, likely a phishing lure. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations and appear to be part of a link farm designed to distribute malicious files. The presence of 'visual basic 2010 crack free download' in the document body and URLs suggests a social engineering tactic to entice users to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://ketchas.ru/uplcv?utm_term=visual+basic+2010+crack+free+download
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cf9534960---rinepasijisilal.pdf
    • https://blsautomation.com/ckfinder/userfiles/files/zemaxakulajixivavagut.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/8egulr293q09begdbq47pu44t8/zenokokexarubox.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099d8b1bb01d---76851694040.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/ea3e8b35b27a74ecd3a778d59ca022cf/53309480197.pdf
    • https://arhometutor.com/userfiles/file/pekej.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/11635d96e23c91d5f579dea46ebd4b65/gogevuwi.pdf
    • http://citra.cl/userfiles/file/lekudujijekexudigo.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a26ce1e36e5b94df1531989c380af500/dubanitazotisojijiweruzok.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1715a0665---belurikufopixodoraw.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d540cba00d---junujirineveribo.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16076248e889ca---26265986395.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e082a1647---34053511948.pdf
    • http://lookkorea.net/userfiles/file/fojepanezoru.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b8012d3f8b398071306408687588f84b/totogatapufu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d506.bin
5479158058b69dc367229251d6660620d28b29df6437fc501ddddae7920e4206		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD506 5404 bytes
font_01_sfnt_off0000e77a.bin
0028e2768e8f3a49a2e1af6725d723dcf0a1ab964ca62ef133d490437ba5e524		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE77A 10572 bytes
font_02_sfnt_off00010bbc.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 4324 bytes

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