Malicious PDF — malware analysis report

Static analysis result for SHA-256 58784cb8a24dcbe5…

MALICIOUS

PDF

74.7 KB Created: 2021-09-07 11:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d193c6ea138547ef7ca9c01c5b99d962 SHA-1: f0c3522b66f142b1048d10fb5689f450a98d4562 SHA-256: 58784cb8a24dcbe5bbfbac710021e37d5da705671aebb1d903d8a4a671ee185a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://smidgel.ru/uplcv?utm_term=larousse+du+pain+pdf+gratuit PDF link annotation
    • http://thamcohoaian.com/webroot/img/files/80650798140.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac72e0ed21c---vukubuzujigifov.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/kipadotumipizapuwovozudar.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/9676659402.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/mirezajaxado.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/gujapasexobejolafile.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/9b8b66de34ba184ad4cc7c6a0920be68/35276296765.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/le7n6h21mq1m2ma4rpg5n48cb7/razolezazinawipibiru.pdfIn PDF document text
    • http://954move.com/clients/4890/File/52607968679.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/15r5hth5c0p315gdt500im7nu1/dafomusixudigapifoti.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612f930ecdf3d---fijuleroxawofa.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f0c5d8cb37b---69187249690.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/77693080165.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771d443e24d---55374903235.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/bugibufakijevij.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/kajeleruxojalipevudewuxun.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/3b2a79f6e22f572ef3569c04acd51364/naruxelak.pdfIn PDF document text
    • http://statenbracy.com/clients/d/d3/d362857cea7b6c304c7898dd6c6993b3/File/16465211697.pdfIn PDF document text
    • http://thaide.org/userfiles/file/17036180166.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3099c0da43---tititizikod.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/9107647707.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/vetebol.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/63753950014.pdfIn PDF document text
    • 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_off0000bf07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD719 18076 bytes
SHA-256: 8f9f43d1ccc6e4fce14913e7c43ddfbdb15c392f8cb043a74ac9d3087e9a2cc0
font_02_sfnt_off000104be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 10684 bytes
SHA-256: 1319a61e993706182334331b15ef9a21730a81b1b9f8b7251ba98f7fcfe0f565

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