Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfb969f27f1b92e…

MALICIOUS

PDF

79.5 KB Created: 2021-09-15 23:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6802ee77605dbba072cc74cdba46f65a SHA-1: 126ebb4f85cbe6912c5e1b113ecb3a0365416328 SHA-256: 8cfb969f27f1b92ecdb193670461ee5531be787ab9d8b1cc3e7b5548464bae3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The presence of these links and the overall detection suggest a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://wastran.ru/uplcv?utm_term=o+zalima+song+download+mp4+audio PDF link annotation
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd5413e26d---1923778731.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/pixaputonasalatovozoto.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/wivenajakex.pdfIn PDF document text
    • http://villkasz.hu/editor_up/tosanilufafepinif.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/zidexu.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fiboxenujuzoteli.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/najiluk.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612edc9cbfe94---legajemabezumipofexup.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/vuzalesubotulonodepukatin.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/btco4b2ojn6c75ml5lismr0v64/69703270139.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/gojaxafusirifozalepamakev.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///vemivugid.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/mumirifulotizudefomego.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414ae13d511---nuvixopomatev.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/xudesotafav.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/74414111290.pdfIn PDF document text
    • https://snf.styleguides.ch/userfiles/files/99274148770.pdfIn PDF document text
    • http://wizclub.net/upload/userfiles/file/94300342134.pdfIn PDF document text
    • http://saimiri.name/upload/file/zorozunonitenixomudivabo.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f557a9206b---delugatikubitimafanapa.pdfIn PDF document text
    • 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_off0000d296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD296 10752 bytes
SHA-256: 9353da0a9fa35266496b62840df0d5b6d79e0275fb63aee913b8f6a4fe99ce4b
font_01_sfnt_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001034b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 17528 bytes
SHA-256: 9e72e48830583de3d9592ba43c90c208fd5e06f8f2c2e524c34fa5dc4d233dd5