Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe069386060cff9e…

MALICIOUS

PDF

88.9 KB Created: 2021-07-31 23:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 83f886ede1a55b984ac9a52fe711b8ac SHA-1: ad6aae619dad3574ee35ec97a59c17f2e826c722 SHA-256: fe069386060cff9ed336547fdfec21e04f570ec6a94f1e376b9ecdfe5bee7fb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous distinct hosts, many of which are compromised WordPress sites or disposable domains, indicating a phishing or SEO poisoning attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or further stages of an attack. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9795

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://studiotecniconuti.it/userfiles/files/zevubagarugaliwuvop.pdf In PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/15515639040.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/59f181718f2dcfab32c6cca2a44f4e0e/fumagobopuzezelig.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/8ddfe28d618b3636c7581acd9d4c9f9d/mogebetog.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/vetejedawisixa.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc1be96d23---89415866169.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/cnmn8hkjn33v2a4ai6m24q3ef5/78464214372.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/fejanapojusala.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/vefeginenewabika.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4bf76667c0---1484539882.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53af574975---wipinatazo.pdfIn PDF document text
    • http://lg-palette.com/upload/files/tegasiginofunepa.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/dudazi.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095388d84dcf---40151021057.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/58418095911.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/22096388736.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/fae80e5c2d9a46c793ed7373c245218f/karetovupefugipedezulati.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf8dd6a02d---30041359292.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/19015026324.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/21237667845.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dca99440509---lirilip.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/2d3b4b88fb0e8c89e4d2b7141dd8cdd3/92289065976.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/luguf.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fae3db631a---gexapuvi.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/21471761663.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc7c0c461---tenusix.pdfIn PDF document text
    • https://samowar.me/upload/file/47348267806.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=arabic+to+malayalam+dictionary+online+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE035 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_01_sfnt_off0000f5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AD 17436 bytes
SHA-256: 63c3081d5318be092ec7bf86bd8c4eec9a84e2cd3fcfdebee7367a959caf2b43
font_02_sfnt_off000123a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A8 10792 bytes
SHA-256: 513c1c03ce401239433b09ee888c4e06f5ef864554aff13f89d01e6a96e303df
font_03_sfnt_off00013ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1