Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb13e68b46b95cdc…

MALICIOUS

PDF

71.5 KB Created: 2021-09-04 19:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ceff41e9b696879e480b7e1e15567211 SHA-1: bf5f286b14444b883e74ac616f94f71f6cb420bd SHA-256: eb13e68b46b95cdce7d7b1af79eb32e92b249b87b4be7bc3fb49c24f63ec2bca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. 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 detection results strongly suggest a malicious intent to deceive or compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pixomot.ru/uplcv?utm_term=lower+cholesterol+diet+plan+pdf PDF link annotation
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924ad05f413---34322525060.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5398e6b331---58121206676.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/68468517646.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/l2s3tm8lrm6lebgg2ls499e61q/tivurubiwefaret.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/16920208f7f209611227e9677d6e7a90/bufudoxilekufegin.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/8iv873vimvml5n0fq4r3q8g39s/gajasamugorugiliparuwas.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/pbt74otnssc5ukdkifesv4pe66/wofowupinikepe.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4f64c472---3779164540.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2efaf3daf9---50973677069.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/tupaxunegosoxaruj.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/73703b9aa003940f44e797ed0e76aa16/98970129563.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/d1b3927ae78ab727ef96f5cd3966dc66/bewidelezir.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210621155911_1722163304.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/14851241277.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/5478180718.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/88818606da7d350abb5d14d99ee14caa/9747671989.pdfIn PDF document text
    • https://salwangurugram.com/files/xirufuvitivagogofaradi.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/dururofowexakutadijose.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd420c52226---36185112468.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/mirusojopidezapet.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/15d1f88806bc5a41dd1c487948060849/vusiwes.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/r3pc1ss32i663a3jujmg4b4map/75184563799.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9ecb6b473---sofenunebadogatok.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_off0000b7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F9 10760 bytes
SHA-256: 10c2529bcdcf0a3f0855adc10980ac034a80dfd9d79ea9b93d7225dcc4f270ac
font_01_sfnt_off0000d0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 15520 bytes
SHA-256: 392a5f93f9cb06699a818bfe6befbf1700606b9f9fc7ede0c38f58fd049914e1

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