Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e8a2177a0b3cd3…

MALICIOUS

PDF

85.6 KB Created: 2021-09-20 15:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 664b1ad77bcd5eccbcf5e4d97a8b1da5 SHA-1: 4e5516e4cfa10f33a1230a9d24771b8ee8c46268 SHA-256: 46e8a2177a0b3cd3a8514b0a7a522ced7e848a481749cc6307983e81577a3290
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pistant.ru/uplcv?utm_term=jak+kupowa%C4%87+gry+na+google+play PDF link annotation
    • https://livres-arts.com/ckfinder/userfiles/files/gipakebunap.pdfIn PDF document text
    • https://limsurempat.com/contents/files/xojunepos.pdfIn PDF document text
    • http://www.siposferenc.hu/html/wokalufajubiwoxub.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613668d9e0139---bepelubenuva.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/70761132082.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613276b9410e6---fubanitukozukefomil.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/gasukovowarum.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/43075693583.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/478ebc14e538a6d01d6acc08162996fe/67786603883.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613278dc06268---62770489285.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/66046079780.pdfIn PDF document text
    • http://bjyhyy.cn/filespath/files/20210920074813.pdfIn PDF document text
    • https://sealskinz.ru/files/file/lesijefad.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/f9481454895bf4ee222057fad6cd8471/sixebejowisaji.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/kubilafi.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/63004051093.pdfIn PDF document text
    • https://nikolsbeauty.com/webroot/f/uploads/file/23950013120.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/13726369410.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/pivudosuna.pdfIn PDF document text
    • https://kiptep.ru/file/65133776723.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/ditusejelupanumazuxetuzu.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_off0000e6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BA 10592 bytes
SHA-256: ddaa191505b29fd571ac0bd24b97ad3e20f5a5a7cc35c5be96d4667456a08a56
font_01_sfnt_off0000ff27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 18840 bytes
SHA-256: a1bfb2d000decc958cb3fb947930fa282eae48a80e5fb07afb2f590db109aa5d
font_02_sfnt_off00012ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1