Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd932395705f4875…

MALICIOUS

PDF

104.2 KB Created: 2021-07-26 05:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e00970f316f3bfdf5729f8bf03b177a3 SHA-1: 9ed59bd4e11164341fcaf3caf0092d5333a1c28c SHA-256: cd932395705f4875626cddadf5131355f3dbd6cbba4d5b95727f37b608f6f86a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous external URLs hosted on various domains, many of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f0b1c8cab---tofedena.pdf
    • http://escqatar.com/uploads/userfiles/file/file/32353706457.pdf
    • http://chinoboxingclub.com/clients/36032/File/mivarisumuteju.pdf
    • http://parkwaywest1974.com/clients/861606/File/61315013766.pdf
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/givodurunixol.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/eaae596f6b9ffd42162fcf0e2b19bb00/mafigedemo.pdf
    • https://davaocarrental.com/images/file/90712331834.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc894ce2889---robemisalej.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092dc8577393---33014599594.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ru9pphh84i1ddkfcpnqvnl9bu6/42635427251.pdf
    • http://www.euro-fly.eu/userfiles/files/87919593584.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a63ee7e90---10538013016.pdf
    • http://tamker.hu/userfiles/file/zubovut.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928dbf79a2a---35358130782.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/afe24573ea54017b8154107952b22dc3/rurevujovaxinadomi.pdf
    • https://cgeminfos.ma/upload/file/58116077250.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082a61b1997e---55939539693.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/cfcf86af8f75eb2fd5108bb68dfd7332/xojim.pdf
    • http://razaviota.ir/basefile/razaviotair/files/20337155226.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761ceebded8---31595329573.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712ccecbd6e---nunisuxaba.pdf
    • https://xn--nmqu14inmf.com/upload/files/mapinelazuzijeka.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/5bed6fc294e99b751c5fae720453852d/44696747223.pdf
    • http://circolonauticofavignana.it/userfiles/files/laxemeg.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=why+does+my+propane+heater+keep+shutting+off
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011aff.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFF 16144 bytes
font_01_sfnt_off0001307a.bin
2c5a809998dbc7e39a390c1a1eddf1f327f1b75a6745d8357382d07f93c8c4b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1307A 17884 bytes
font_02_sfnt_off00015fa5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15FA5 16792 bytes
font_03_sfnt_off000177bc.bin
e5b2c8fec7b35a45b38f94265f2f3a3112d9fd8932c8b0ac321c08c83dfc6fee
pdf-font-stream PDF embedded font (sfnt) at offset 0x177BC 11200 bytes