Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78640248988f39a…

MALICIOUS

PDF

95.3 KB Created: 2021-06-25 23:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd587a8592ac6c9928cf751bb03edaa1 SHA-1: c7d4365beda35ae0f56ef3e4ae89016667fbbc5f SHA-256: b78640248988f39a9d97e84a9a3dad063fd2dea520776523389c3cd292be1e6b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm used for phishing or malware distribution. The document body is heavily obfuscated and unreadable, but the presence of multiple external URIs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://almoheetmanpower.com/public_html/userfiles/file/65812902530.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/4da2a442ad24ed511a661b2f43b0d227/24028190217.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/950decf1ee84c580dafa6c2feac2a5f6/56712588094.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/6ba924418403612d09685852b4af127c/gofitejazibite.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa43e8890e---24233417400.pdf
    • http://arcomproltd.com/userfiles/file/zakarixaxusa.pdf
    • http://tanriovermensucat.com/uploads/genel/files/busituxojererelopepiv.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/rumajuterigusibik.pdf
    • https://clumba-indoor.ru/files/files/20622762243.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e696ec389---92716968602.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945c76eefcd---80142762145.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/devozo.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/33b1f81d9c6334caf5626a0651d88897/45713993802.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3766970d72---buwofabudorinito.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/11b94de4d46fc5f6f88cf8e9cb5b7b0f/limujipewasevu.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bfa1841db---jedewujekesuwenur.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d5fb565e1dd2d3eb0f82ebddbb750afd/42344123739.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/80a592b3cc468db389d59506be31b303/pufovamibubami.pdf
    • http://ototavandosemesi.com/resimler/file/vurukufa.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/02db3b5138ec1dc29f2853ad2922f305/72710810817.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/e3a8bae0ff09cbbf78820d7f3df91957/feguge.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/u48behll821jk6vjb2janglg7d/sazeb.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160775d0042687---tiforixijip.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/i4bpn3npo0gl8ngn0o7ruvskrq/pubudonegasir.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=autobiography+outline+template+pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110D7 16792 bytes
font_01_sfnt_off000128ee.bin
c1603991a7f810013bcb1f05cd3d6a62e89f52ed1b68b539352a7154586d7f2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x128EE 11112 bytes
font_02_sfnt_off0001423b.bin
11de6d30a08c378691582df0392f8c17d5edea6abd73f11fc29b0e676c2a7929
pdf-font-stream PDF embedded font (sfnt) at offset 0x1423B 17852 bytes