Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a46e051b4d4f17…

MALICIOUS

PDF

101.3 KB Created: 2021-09-01 23:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fc723eb8b4c5c3588d5cb9a94d89e679 SHA-1: e90f13f2f691893d43e49988de7d712636f858a0 SHA-256: 07a46e051b4d4f17b243dcfaa8fed633d8f3ab591db86cb2167f6d836dc849a9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates an attempt to leverage these sites for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://medvor.ru/uplcv?utm_term=sushant+in+ms+dhoni PDF link annotation
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f091d1c327---xutudoputagowofabisepuxa.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6fab45e4e---11210897826.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/budoro.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0e5371d39---67078884331.pdfIn PDF document text
    • https://kildevangen.dk/files/muviwer.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/0e57d581913d90849ad402f844fc0425/42800812893.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/zosewudoluvu.pdfIn PDF document text
    • http://shriramashramps.org/userfiles/file/jamefe.pdfIn PDF document text
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/zetur.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac114edafae---futufixikabegokenudef.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/qc1d7t3k3uih6bu395tlte5vn4/45267657617.pdfIn PDF document text
    • http://kd-council.com/upfile/files/lidazizanupa.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16088d51b309e6---66813170489.pdfIn PDF document text
    • http://bjjiffy.com/upload/77674966135.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d22a497219---lolaterevuj.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/45415195235.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/gilaso.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/megufinos.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/zerujugiguruve.pdfIn PDF document text
    • http://zenithmetals.com/files/vifewizive.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/najowutodesugavo.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/4gagffsnf93gj89an9ucc92tc4/dexaripupew.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/38350678114.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_off000123be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BE 19672 bytes
SHA-256: e35f39a32feb78df3dbfce9d203fa4b768712125536d45d6a3145019e084037a
font_01_sfnt_off000157c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C7 10408 bytes
SHA-256: 8cda4f04f24506755b7c0ec4fd25601297bb30e14c91cca1aa8210e73048d02b
font_02_sfnt_off00016f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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