Malicious PDF — malware analysis report

Static analysis result for SHA-256 13938442ca7904d9…

MALICIOUS

PDF

83.6 KB Created: 2021-08-19 11:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e593e4568bcc82bb872d6c41279659d4 SHA-1: 744f10870088c984fe2d8e45f277a158103d1973 SHA-256: 13938442ca7904d929a3f39bf05d6af95b5381c7ea84fccab346731178908976
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable hosting, suggesting a link farm or phishing lure. The primary purpose appears to be directing users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://abwmercury.com/uploads/files/domagovokibadagisagisi.pdf In PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/efaf08901a6d92ae057ecdac7d25df46/85462181768.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/46916773197000db16f1f8a02bdf28d5/82360471097.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/padutidomi.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748058c12e8---xufisopat.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/87801094879.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/vagetosabit.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/14593132686.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/punitoxafemarupu.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/80035485314.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090df37edcdf---wapiximaji.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/77cbca15c468ef96703917626366811c/96562729972.pdfIn PDF document text
    • http://boxethai38.com/upload/file/lujedapofexa.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/64402564551.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/1534215766.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/livumizufipanumedad.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/5d39759ad7469311dbad2db7ec1c5f9a/balanetoxemobewuv.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844722f2cd5---72984324940.pdfIn PDF document text
    • https://negaratoto.com/contents//files/bagojuxa.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c68457207---95896238204.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/vagowavukat.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/12802126629.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d10f82510---regetamuwedabewevab.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c984cce7bdd---33052005612.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/gijesadevu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+introduce+yourself+in+an+interview+in+english+for+fresher+pdfPDF 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_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 11256 bytes
SHA-256: 0a2b789c638be8e099534d6213b7e4ccad2e01c9fb0ad8247a7aaf4f255574b3
font_01_sfnt_off0000fba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA8 16836 bytes
SHA-256: 1459eb304d8105b3ecefa0a9d57dc40c37559417f34b89fa4e5e0df0887edcfd
font_02_sfnt_off00012715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12715 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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