Malicious PDF — malware analysis report

Static analysis result for SHA-256 772cc972d930d9a7…

MALICIOUS

PDF

93.9 KB Created: 2021-07-15 12:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5b5a755112d0260138c64c4b63928133 SHA-1: 70fef7d3f64b9283ed4ca67eec7db4e3d103f1c0 SHA-256: 772cc972d930d9a76c198a2bfe597d38fc13638212377ca8c5679f6eda62f1bf
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable domains, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing or trojan variant. The embedded content appears to be obfuscated or corrupted, preventing a deeper analysis of its specific payload, but the link farm structure strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ptogel2.com/contents//files/kazotebasalalokotivoted.pdf In PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d265c82af---seziwanifamileg.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/befevesefigimoburamipe.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/71266732928.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/9affc10298ad320d3f2e0d1986740402/9345806860.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/9448b72e0f25a534db1bb0880e47ffc9/rowoxipitefumolajik.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160823562b09fc---95602562191.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d16c6621f---juwef.pdfIn PDF document text
    • http://abroadster.com/files/xamuwip.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/ce5a6bd385289f30ab511a8e45bee0ac/50134963741.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/23696368783.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080333bdf3f2---mimivinozusifaxupopevo.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/69505664797.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/3a457545b8ffaa1fbedd8173fc0351f2/99538988621.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99a88e0ac5---13220825315.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160e7db472d070---nanasawezaxitajukeferuzi.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/10696872791.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/d7rie5qisc100kepo65fh1rrpm/gunezozan.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/p9jtroh49geqjtpft9h40toioj/56229992870.pdfIn PDF document text
    • http://supporttmes.com/clients/2/26/2647aeee05d38019bb2ff7af4ee9f9d5/File/felufoza.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/8t7at1marsrfvi1u300921jma7/bezanepaw.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe66e642ef---50614345930.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c732b038b---bagoxugewu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=most+awarded+tv+showsPDF 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_off00010abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D4 10248 bytes
SHA-256: d1fa0deb4cdf1c0593777b32b84446f7f55e804ede2ad5e540e7e38766a7313a
font_02_sfnt_off00013a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A18 17988 bytes
SHA-256: 4adb403140d8a66c24bf68ec16b9295d73bdb67b002c69407a975bc1a558f2a8

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