Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8076a1e8879d5d…

MALICIOUS

PDF

100.7 KB Created: 2021-07-07 15:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a72352c22a45cf1e9ffbeb4ab47fdbef SHA-1: a1c80830e81b4f51e997cf60e9ab37a3cc230438 SHA-256: af8076a1e8879d5d8b3ee8e21bdd915043a149d0cd7bfae08063731eed6cf6d8
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or are part of link farms designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or phishing pages. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/vigenexunimukisadunaz.pdf In PDF document text
    • http://azizolace.cz/images/file/23258703567.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd050decc---78634349163.pdfIn PDF document text
    • http://valeneighbors.com/userimages/jomevinadowevagawuju.pdfIn PDF document text
    • http://learningkey.org/userfiles/74071580291.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/1d960f23d277109a5b27a3690633bc2c/ruriwosi.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a082b276b3b---gutokofitemuriborased.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/kivilebijibaz.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bf26831af---daximafedotat.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/3dbe03f75001eaf9e02093f74cc5eb6a/67870028222.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/gadukulusa.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e1f92c50b---kowimeben.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/t6geqs8tng58g0olhbqmajg7n0/sotokijadusoxigakirisafej.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160af9db33d08d---wotevezedisitojexajenufex.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/nolamutubinipevugegosos.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/c7671e05ec1f11759b212b08724cae3a/tilupadijubirasadogenu.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/71953041285.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/49804b850374762086d467fd85a78a0f/92567013034.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/dujasa.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/82453791661.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/18l25ou39m1u1ss9abbp1v9n35/69755695769.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074433145507---23054156495.pdfIn PDF document text
    • http://testbankinstant.comIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=power+system+analysis+and+design+glover+solution+manual+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 11208 bytes
SHA-256: fc37e623e1c338430e99411fbf30e677609a640ca1e6f72185a71f3a083e67a6
font_01_sfnt_off0001138c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B69 2196 bytes
SHA-256: 932c1d679e220d41a3dffdc544a0ce57419a3f2f61d7038f48104ac983012b58
font_03_sfnt_off00013609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13609 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
font_04_sfnt_off00014b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3A 20356 bytes
SHA-256: f73408a0df179a8d2ce6474091a971005d813d728728dfcfe57ad3c7883220ad

Open this report in the interactive analyzer, or submit your own file for analysis.