Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42bde0636c26f9b…

MALICIOUS

PDF

103.7 KB Created: 2021-07-03 10:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1caf384bc0c42d1a18a4ca8a9646c89 SHA-1: d29ad84d4b6e8264e4ddff439e8cb3dd6379d395 SHA-256: e42bde0636c26f9bf0faa785e46916ae946de04833dc473065ed342e9a16fb20
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 as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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://garglob.ru/uplcv?utm_term=examples+of+gender+harassment+in+the+workplace
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/pnju36ph1665rh2vejhn8vpl9k/9497790770.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/142be19527c9e4f249132dabcacfc7ed/devalirifamivozibipovo.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a46382ac1e---tuvuzuruvinobimomixikuz.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979e78c4093---64596141284.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c26311696---jemafigodovafefa.pdf
    • http://polymer-optix.de/userfiles/file/19135971931.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/b6c8a5dee273ae9a7a841d28f920cd9a/47566362689.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c65e8b79dc7---97903674537.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eaf0390e1---38948117412.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080377c9564a---35063235156.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/0889f9d2ec390677d54427d74f7a0a5b/12502979124.pdf
    • https://acgroupenterprise.com/userfiles/file/4186204437.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853f9c00554---tifefoj.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3754f235c---11809787340.pdf
    • http://clinicaveterinariailmarzocco.it/userfiles/files/43993191981.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/mupopelifobovapofuz.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2222b0667---nodirabejuwumete.pdf
    • http://majorpropertygroup.com/userfiles/files/64932066384.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/1e9dd1b8b4ba3db418b4075f6855f09a/41242788371.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b368bdab0---jeditevajereb.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/0db1ee34585184211758d275a11ffb5f/84741621147.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc48908e88---pubiz.pdf
    • http://atdawnwelift.com/userfiles/file/winobuj.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/nmhtoqd26vr92uk6lpr3tdd7ui/86397111178.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780ccec883e---tevofuraxofitojokug.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/cf911124aa0255266f00b2488ef289f8/43207525625.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b03e74475c7de17aa6a97be5c2bd1a9d/bisafiroludeval.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_off00012ef2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF2 16792 bytes
font_01_sfnt_off00014709.bin
17dc520d126e14212af9371814bee507bc32a9c00cd8036ebc61dc93736e4af7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14709 11332 bytes
font_02_sfnt_off0001615c.bin
a90fc08254820fc92fe159f03f338aee9cd4fa0e3475f466e24a330abca9c1c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1615C 18124 bytes