Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d0f0c42afae74c…

MALICIOUS

PDF

96.1 KB Created: 2021-07-29 17:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 74cfc98e9105e94e58c36d0cc5fb75f0 SHA-1: 2f489d2c6eb18deba1831fdf5ad08d1fb076de5a SHA-256: 46d0f0c42afae74cbaca51cddf1084e7e535675f07e9f4ebc9286696dc162d38
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the PDF structure itself is designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ural-resyrs.ru/data/file/55286507203.pdf In PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/8024ca1affcfa7ad2f5e4fed1426e803/35048379678.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5876cbb47---fijalokobafaxag.pdfIn PDF document text
    • http://skomi.ru/img/files/file/vufesomu.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/xokaviwomab.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607008954157a---katad.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/40fa92a99d773d9491e152adc43219e1/71306943303.pdfIn PDF document text
    • http://starsunited.at/upload/files/kumurukunimuganuwitev.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608853102b54b---lisodi.pdfPDF link annotation
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/wafalisotala.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/789e6aae163f0c580cb8ccc44e4b705a/22684969315.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/12212056317.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/7f6f275dca00ae407a53ca7e2d736fc1/18820137552.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/ksbapcskummt2tvalpckqicb8t/61677058637.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/53587663647.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f01589ca69d---vigitudisidaruxuv.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/82873127415.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/44898096636.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609836e6a056e---pabuko.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jiv6mtltpglr4ifbrk3a911iva/7537486069.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/391uk34tq86dskobdi1smurc0m/95956822413.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/6837300410.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/d3e8ba82d2510fd91dcbbbf3e97690ac/87244695568.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/madiwogujukijamaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=ou+envoyer+ma+declaration+partielle+de+successionPDF 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_off0001100a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 10980 bytes
SHA-256: 706316c336164b4b74385e17d452a52df247e6a781a2b80d7c134b7cd1430699
font_01_sfnt_off00012990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12990 18664 bytes
SHA-256: 52110be7128df1c441dc11b9fd2e6baf9237f19b6066ee87080a493dbc44db90
font_02_sfnt_off00015801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15801 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1