Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae57f1283c0fb4da…

MALICIOUS

PDF

83.8 KB Created: 2021-09-03 14:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ef26360d589e6642199661fcd7db56f6 SHA-1: a6dcb8a63a16bd3d6e56919f8b899996fa012e7f SHA-256: ae57f1283c0fb4da9696ed853b0a6d4f879755633f5d803dce471d5071dcc196
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to unknown PDF files hosted on compromised websites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate this is a link farm designed to distribute further malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c666747cf9a---kexekodawijudabariwiwi.pdf In PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/sokapisozexasak.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/92389443081.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/vutanaxuworumiwaj.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/27499559990.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202108292023576210.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/0fee42c638d5c984253ce8f19283eaaf/duwej.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/fedixudibijenukopo.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e52fa1276c---73376488274.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/829557bd9253d76783eb48ab6500baca/jipufoxizubuw.pdfIn PDF document text
    • https://senhewood.com/d/files/bevoxedekakukariz.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4833dcb18d---12097260529.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/rorumin.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/xasafox.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/fac7f37175843f196db7b08aa1c4690d/sejowerodotixudixefitamax.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/24122083178.pdfIn PDF document text
    • http://andrewclaymonfishing.com/clients/a/a7/a7b0d980ee28df7184f998a87a00dbd5/File/kanudegozubug.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/fejidepa.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/06d7930b7ce7c501dc91ca5fee0f0d03/tomimizavidiganasefol.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160710f4db5f0b---bibinani.pdfIn PDF document text
    • https://huaku3c.tw/uploads//files/202108022130175497.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/0e6f17d0ce2d16e84276a05581fc332d/rapituseweze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=ejecting+disc+from+ps4+manuallyPDF 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_off0000e0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E7 18016 bytes
SHA-256: 94563542d19550c9c39aec86f8e10a1ae0f9ef9ef83736fe8d79e5e4c863e1c1
font_01_sfnt_off00010f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12721 11368 bytes
SHA-256: e869460d7b20641dfa0bc06bb2105ea174a72092937cac2eaf7c4e7eea3c30d5

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