Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddf8d0ff20d81c7…

MALICIOUS

PDF

97.0 KB Created: 2021-07-20 12:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3486002dfa86b53389c355e8875484a3 SHA-1: 58cbf26ad9ba1ec373c3b990fbb7ea94605f923b SHA-256: 0ddf8d0ff20d81c7c53ff664de4d39c0dee16165f3c94ef06efde14487508b19
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a link farm designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://absolutelyneon.com/userfiles/file/12233742315.pdf In PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/05328e359bb3470a9ecd0dc8d28452ad/vagixarilewidi.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/12388108876.pdfIn PDF document text
    • http://ridendo.cz/files/file/89093914194.pdfIn PDF document text
    • http://artospace.com/pics/file/80473660732.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771e78d49a3---zejega.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957a2a04e74---2852653359.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/71717078346.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/xikisavutatabibujineta.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/096996ed90fa1077781a14c94e077c51/1467189720.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/e685545247607ba87679bd36de05dd73/79013170317.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ae957dfc---30466505956.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/kizikodusam.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/sqlcgrahm81ocbtfthvaafuu75/fumezesato.pdfIn PDF document text
    • http://reunionclass.com/clients/7469/File/paxut.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/35112510250.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080cd7b649ec---gibumewevunibizutaxepakid.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/cj7922hsphvgd7tc2oc0v6ldse/11476438678.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bceb7e989d0---92151848282.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/piretavonopi.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/041082aa89a9c4a0f9e6d55619dd9179/55101839983.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed4b7c051d---semudokewibilatopo.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/lunesofonobedup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=prime+time+student%27s+book+answersPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11826 17464 bytes
SHA-256: 9ecccee0412c29a24014625e12d1f5ec95602086e6485b8efd7e670facb92003
font_01_sfnt_off00014595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14595 10816 bytes
SHA-256: 86ba640ed47c5304fa2c5d3f523f58818d51b48098982de73d502ec93765c8cf
font_02_sfnt_off00015ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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