Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d226b540fa4113d…

MALICIOUS

PDF

72.1 KB Created: 2021-09-04 11:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4f64fa96c0b0cb7d396995f3d2e12a96 SHA-1: ee2643a39aae93f3f32ff6e2277659b2187af242 SHA-256: 7d226b540fa4113d3be63674b3430dc8e1bf1b81e600161493f70643a5c201d3
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=super+affiliate+handbook+pdf+free PDF link annotation
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/fc79be685d9d59fd30f856f68103e173/xavarobedesoj.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab25031201---jawoverejalitigewupajedug.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/62057609641.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/zuwatewemijodebolugelufux.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/460a227a8f2a2365b7dc9c3008c6bb65/gepeguxewesomitilujizes.pdfIn PDF document text
    • https://akita-inu.lv/www/files/files/67949749009.pdfIn PDF document text
    • https://asiajitutop.com/contents//files/jixoveriwixadaziramawitin.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7c425063---bilaxeved.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/jne8h5tof9ldv7l668jtb1c4kj/14644907971.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97441816e2---zevodipiliwajavu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecdffa68aa---41785291076.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/50199981537.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/56319765521.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d0e031440beff51efe6b66432eab240c/zadagovoposozi.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/70880115816.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/pawuxiso.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/tufap.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/ccb3d389080f22214bdbd54287994fdf/2845837235.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/bd5206c250c60161534a7d0579db8480/22166944675.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607378f279170---zepanojasanatuba.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/95796828377.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/60361711397.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/maguxux.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_off0000bafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFE 15348 bytes
SHA-256: 70d944105f598c80d31a16d43dd5b5ef903f9beaa2b6df0425d4e50dd392b473
font_01_sfnt_off0000e209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 10836 bytes
SHA-256: d4455e5cffd9126758c228980c63b60b1ae43888905dcec6a30c05a502e38974

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