Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf7b5cedd978df3…

MALICIOUS

PDF

83.6 KB Created: 2021-08-15 05:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ca261e27dac37376115ff4599bc5cc4 SHA-1: ba7cfc8b864796c779da75c1b4a41b16fbfade99 SHA-256: 8bf7b5cedd978df3e0762637624a533adfdec4274ac716a58466b6b73cfbe644
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malicious redirection campaign. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the ultimate destination. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of embedded URLs and the link farm structure indicate a likely intent to lure users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ms8e0mcm2hov2rvr4kq27cedij/bisazodizusel.pdf In PDF document text
    • http://lubrifianti-auto.ro/files/file/tamoperadip.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/xelasavitinejagexo.pdfIn PDF document text
    • https://manenshop.com/upload/files/83456133959.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ebf7a9faaa7d7d14d0dfada3fec39374/godogibojibogifom.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/d3daf04781c252cc652753d5de747f85/manigulexaferaz.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/95701041331.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/jibimo.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/gisudo.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/larasuzowavesizebi.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/87115380758.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/42365342502.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/tufrk6767opg3eq03ti605tume/8156127344.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d8af63486c7d16f13b2014eb0e0c751a/pomupupafajarik.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d002a5dc0f51e0e2362e0f42dcde89d1/wexepawoma.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/goragabimezumarimafudif.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/9a22cece33516fd4ad9743e194ff9ba9/19132842458.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa430519156---vuvojejivewupo.pdfIn PDF document text
    • http://africareview.in/userfiles/file/vikekovunelujuda.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/7715ed3ac07a027a4e48482e1143abd9/53049928137.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a984a22fc---xutosodotizawatiki.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/26542874947.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/90171000699.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/61997631534.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d034ecba8d4---53198421797.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+write+an+attention+getter+for+a+persuasive+speechPDF 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_off0000e330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE330 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 10956 bytes
SHA-256: 524a34c6577f95c85e897abdf355a21d08a11984b4f3f9102465b2a2b2c287a5
font_02_sfnt_off000114ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AD 16760 bytes
SHA-256: a99f400d8aeec15d7c745c68725933b94b4956f8c75e285b2bfe7cd1a1d5c6e3

Open this report in the interactive analyzer, or submit your own file for analysis.