Malicious PDF — malware analysis report

Static analysis result for SHA-256 009b6ab3f3fc4d43…

MALICIOUS

PDF

69.0 KB Created: 2021-09-29 08:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9aff81139aabf401a75daf8d75a0ce8f SHA-1: bbd6e0438a4b8b709d18a4b34e77ef064745d855 SHA-256: 009b6ab3f3fc4d43bac0364463aa8ae05072eb797758711bc08fa1ba7f67efba
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many embedded URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple unknown URLs suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d89f9eace9883bb7c97ae3ddbc1e5c99/kozilizufanomazen.pdf In PDF document text
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/jixezeguwanurefitur.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/30981593194.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/dajidow.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/tugivinolixovil.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/zenadujilev.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/lasopuk.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/68550901006.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1614822d716405---zinuperefu.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/83701969861.pdfIn PDF document text
    • https://migger.dk/userimages/file/56561180592.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/70432874888.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/99008625210.pdfIn PDF document text
    • http://harrodsrentacar.com/public_html/userfiles/file/saduragakixixo.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210928174500_ggbpiw.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/21111630001.pdfIn PDF document text
    • http://importfoodfair.com/userfiles/image/2021/09/file/velowo.pdfIn PDF document text
    • https://allianztc.ro/files/file/vuxelataxalapijosujezef.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/vebifisemelonakirirodavu.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/7156889236.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136297e6e046---90974254362.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/80590885826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=worlds+worst+pick+up+linesPDF 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_off0000ada7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA7 15832 bytes
SHA-256: 55413171c893567ef97cc57bfdcc71b9bed8d18b86f3de4758317508a32813df
font_01_sfnt_off0000d62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62E 10616 bytes
SHA-256: 86f75c50b8f2c7c22595ca3abc834e5900d79fecd3905671fcc41da73885a91f
font_02_sfnt_off0000ee9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1