Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6339290ac09adac…

MALICIOUS

PDF

80.8 KB Created: 2021-08-14 21:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ec1ce4014c936f0e014bc02adff98a35 SHA-1: edf3af0432bd16ad13e613f02065563021ca15a2 SHA-256: e6339290ac09adacddadf43e3ffb1e73220591d4ee5e85db7ce2d8d6061ee84f
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://galenbio.com/images/upload/file/92472516209.pdf In PDF document text
    • http://deeringbayrealestate.com/userfiles/files/50231421776.pdfIn PDF document text
    • http://valeneighbors.com/userimages/bevun.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089aaa46c8ba---zaxusefiju.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/fotikepenejipomabe.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/657a370bf31f842b7e5e7c08190d7544/49544013042.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/7260806301.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/67129803365.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838c8aa4bf3---38917384075.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/07be8i0726kaogmhmjliagotl3/46253996599.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/fameruf.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6e20d9f11593e9db53c1a7d54895333a/tuxiludogodexofegonema.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ns2igcav3d8gcs7vhc5979rbhn/88677813676.pdfIn PDF document text
    • https://ip-pharma.net/data/files/podajikuzebuve.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/gelofufofakomofumane.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/riribonukalar.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/ae5ad288d319f2e996f4f61404ed154f/64004046433.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/eju3uov15rl0othlfqmla22qg8/95611571923.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/75703266449.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/7ve156oc8oea03vfcu39gq9dh3/24681818825.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/sesux.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6eedc8d6f8---22713685876.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/99901443175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+holy+quran+in+today%27s+english+yahiya+emerick+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_off0000d0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B6 18648 bytes
SHA-256: 188e5a134fcf4d779df27ccb4b8b14d844b0413125b89d8fb1338a12a99902b9
font_01_sfnt_off00010014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10014 11516 bytes
SHA-256: 2c097e065fcbd748ac5da20592c50688dc3669289360f053a0d46796500af7dc
font_02_sfnt_off00011ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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