Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0b097f2c9ba77d…

MALICIOUS

PDF

92.6 KB Created: 2021-08-16 22:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ca2306197841f5fa5db8349aef346432 SHA-1: 0a77bb4693e9cdc881b8cc6c4b04af2b4efc4fdc SHA-256: 3e0b097f2c9ba77d62aad58d50de1c6c5ff9002b20f4169f12e987481a4e312c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites. The presence of numerous links on disposable hosting and compromised CMS uploads suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/6n7l2kuc916gu8r2fdv8sajv2u/78530002482.pdf In PDF document text
    • http://eprdel.cz/userfiles/file/46856307436.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/74258750418.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a238f0890---nixoxam.pdfIn PDF document text
    • http://biosite.ru/images/news/file/37954290557.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/gimesolupitopesolibodudir.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/al5ghjg03a35dm7f6mjirhokut/sabip.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/zitedolefokividozumujigej.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c20a3c68f5e---26777837645.pdfIn PDF document text
    • https://argumentua.com/i/file/fopavuwisorowe.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/65787399106.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607426181da88---73656708718.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/tesitavamowegawevuwaz.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105050349327076.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/79035689449.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/d5d94ba3c522e7e5db0ab031ba08849b/divixekakirot.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/28418689033.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cab1b5f2f00---87726559622.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160db6c63856cc---23282287439.pdfIn PDF document text
    • http://change4best.ru/upload/file/zafemebame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=what+is+the+average+nwea+score+for+5th+grade+mathPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 17720 bytes
SHA-256: df04baab23c41e9782a635b72bfed0b10653e3fd42de6137e77d95518c2c8fae
font_02_sfnt_off00013157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13157 11156 bytes
SHA-256: 43b8fb2ac08a2a73ad785d1afb13cb687dcb4709205e5e156d538282f8fdc5e1
font_03_sfnt_off00014b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2B 16932 bytes
SHA-256: 55ebaba62d284412eb2ea3e7bfe2b29bfa7af2789101e84f20f8b13d4a153a21

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