Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e65aa2f15ace8b…

MALICIOUS

PDF

69.5 KB Created: 2021-10-03 23:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f619a2b458082e7634a49eafdd00224b SHA-1: 085b42266db27c4631f0774b48fac101d87d90c7 SHA-256: a1e65aa2f15ace8b25ba48c9308b4ad54586adde31618310d1fbcfae54284ed3
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or redirection mechanism. The presence of these links and the overall structure indicate an attempt to direct users to malicious or phishing content, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139aa59a1621---mevinabo.pdf In PDF document text
    • http://doks-films.com/pcms/content/file/wifeguwirodilobogiwod.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/61db69abd16a1aadb48ef54e75fcb0af/60497423493.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/32702016973.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/kafexoxogaw.pdfIn PDF document text
    • http://pasaru.com/upload/files/palej.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/tapinujixabozirurerijogaj.pdfIn PDF document text
    • https://ismart99.net/upload/files/guwomoxutasu.pdfIn PDF document text
    • http://www.520amis.com/upload/files/givibuzizugisopexa.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/27d5546e05b8cfaf6932d31193ef33a0/54752880474.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/85933684925.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/bokatutoves.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d7534bb9d---bozajit.pdfIn PDF document text
    • http://hig-hegmann.de/userfiles/file/83362468113.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/gukubevuwatafuj.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/xevexorimefubu.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161456aad4ed6f---27079509654.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/kupowutodaziwamel.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/lakidoso.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/81643528295.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136a8b64d61e---76559536604.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/37234057645.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/82590565877.pdfIn PDF document text
    • http://hotechike.com/files/files/30342451978.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+increase+size+of+slide+in+powerpointPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB245 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5C 10752 bytes
SHA-256: 9f2ba91ad8240fd46a61d70081caf9b24db98a9a5e7c213ed0f0cdf386018968
font_02_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 14608 bytes
SHA-256: 7988dfb5614805500dfe58dea32a00a0501e50ff7e765c2cd7f6939198fbc6f9

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