Malicious PDF — malware analysis report

Static analysis result for SHA-256 00099a2b53c5e1af…

MALICIOUS

PDF

90.5 KB Created: 2021-08-15 19:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fd00a407a6264183950977ee8f210d99 SHA-1: f36ec5d04d2683f1076980db322995346b40fbd9 SHA-256: 00099a2b53c5e1af604a38f1bbc166e0eb242454d7622dd642d44b0b4dc1956b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by a ML classifier and ClamAV, with high confidence. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to malicious content or phishing pages. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a pattern of using disposable hosting for link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/kf0jaf9g21tm9aojha3ld5ip6p/2022894780.pdf In PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b47b73396c6---gobadodiwaforiberuvoj.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e99cccbdcd---pumamowalisilavog.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/vomogibakagaxofarusivipif.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/wozisaxaxozaxixevop.pdfIn PDF document text
    • http://lawngo.net/fckfiles/bizugogut.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/57596080511.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/12193794505.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/161188e706098c---dusizeluwabusi.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/gutemunize.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/d814f2835c5ea277e3c49798c1aa8dd6/rataxuxupomigidojamatumi.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16279491459955.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b774d04f1---71202409722.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/opv0ud4djodekml2pgh28p3h87/kirekududatujezunebuvej.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/73242651701.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/92853063743.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/32043425525.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/1ae1ad997858fb31109513041d8972fa/tawilos.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/27880689708.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd6a78d849---daxabulewuk.pdfIn PDF document text
    • http://www.hmh.sk/files/articles/file/jolelekuzewuludosegezum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=introduction+to+networks+%28versi%C3%B3n+6.00%29+-+examen+del+cap%C3%ADtulo+4+de+itnPDF 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_off0000ed4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4A 21740 bytes
SHA-256: bfb94cf4d05d33836c90a58af9a17d8b050e963650aad627a41cbcd8f3f10eac
font_01_sfnt_off000123d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BEA 11896 bytes
SHA-256: 0963f1a4371362190add5a2cca8077d9cf6b61c1b088668e8249ea89998a8bf2

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