Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3119ccae1e09fb…

MALICIOUS

PDF

84.9 KB Created: 2021-08-30 01:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b0fe02a9b68da75111b3108010806210 SHA-1: c3eeb1f85b873c1b8ad43f9af27faa140c4472d9 SHA-256: be3119ccae1e09fb9c140993db679e10e286257f00c3230b24bfdab25ae153a5
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=top+10+sexy PDF link annotation
    • http://matstravel.ru/userfiles/file/86844649602.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/926ebb4665b28398023dc6e05b4a6659/kojafokat.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/wabebitidagiv.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/dojafujudonok.pdfIn PDF document text
    • http://abwessex.com/uploads/files/zulufifokeb.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/bcf7fa3c535f84418ebef419ae1d9892/3907796516.pdfIn PDF document text
    • http://vit-physio.de/file/90530809298.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/muzujewexo.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/763c01cde9db004e7b17f26f85c60b26/36309938359.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/xanuloxoz.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/sawemijiwet.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6851f1645a---82578205639.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/26608263900.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/pipox.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/suwekode.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3712b2d46---matun.pdfIn PDF document text
    • http://e-sportis.com/images/upload/kepupezupabedazitub.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/75e92c5faa40a8cc30b19a0ca1103412/19748061399.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d23f266b4---wotivorepibu.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/67122164903.pdfIn PDF document text
    • http://rurisnet.org/images/file/fiwizanidivevotuwexuvu.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/24e920d13b2ce48f43d91b2b8f6dd445/nedexavogubaja.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608afbf6e7c74---31498248195.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/vupifinizugo.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_off0000e533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE533 19204 bytes
SHA-256: 1e3b594aaf9788fb77437712c2e68bdd7e832a2e7c26e9a7d722aa0504efbfe6
font_01_sfnt_off00011746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11746 9996 bytes
SHA-256: 4ff57800c9a3a21938a90ce0e27bc0a749e53891fa267d813ad196954127de6e
font_02_sfnt_off00012da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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