Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0bf7c6d2b7fb436…

MALICIOUS

PDF

91.8 KB Created: 2021-06-27 04:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e38813f919a3099ffbbf15e760e72152 SHA-1: 381d1d037c4cacab3477245b33139e1708adf282 SHA-256: a0bf7c6d2b7fb436cea36bfb5bec053abc60653eb1063b43b9d894ec0bf949da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs pointing to compromised CMS uploads and disposable hosting suggest a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://allytemp.ru/uplcv?utm_term=apa+7th+edition+cover+page+format
    • http://mfcwestenkwartier.nl/beta/userfiles/file/79094763790.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076bbf9f20cc---fuponejijusogobiwuwekazil.pdf
    • http://bjallstar.com/upload/file/46417699481.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1068c2780---88424019483.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090f288315dd---ledigulinawewanevixinoruw.pdf
    • http://kuppersbusch-center.ru/uploads/files/54260857821.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089f15425e6d---164992192.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ff1d1c6c398cbd51de28d38e096ad53a/15055993751.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab170b3f587---94491899806.pdf
    • http://alphasigmaoverseas.com/userfiles/file/koxego.pdf
    • http://lab4050.com/upload/editor/file/45403539666.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608066c9c23c8---gajerokavesezipuzorivazib.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a44b39416---53810721402.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a861c75f7aa---puvidu.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/62b9e28a3b25d8663c0762f0a6ff4af7/15350580758.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89ef805e2f---84288160948.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c74e8027c---24662009289.pdf
    • http://lyzjkgm.com/d/files/71187618338.pdf
    • http://www.contectrade.hu/fckfiles/file/xejonetupoxiromaxusonumut.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0dfb4e135---rekuxawamekumawavipota.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c298b8b2ce9---pagusipudozasasopivexa.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79314c15c3---67601478253.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6343d5c0b7---vekokup.pdf
    • http://ankamet.com/userfiles/file/juxuxuwerox.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c4f1dd0d8---wureluji.pdf
    • https://oliogalanis.com/file/tuwonigezusawexoreju.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_off000102e6.bin
7c55d788ac027d8e49bcf77ab417928fad2fd091be977ae6aeff3b9ee1ffdee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 10948 bytes
font_01_sfnt_off00011c09.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C09 16792 bytes
font_02_sfnt_off0001341b.bin
6661c8d52123b8cc07887988dcc14bf7a81010281b10759dc839838d6f7bc252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1341B 16964 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.