Malicious PDF — malware analysis report

Static analysis result for SHA-256 12db5e4f1bc52e1f…

MALICIOUS

PDF

122.0 KB Created: 2021-07-09 22:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 01937a35e5ebb2e8fd1a2cac255bace9 SHA-1: d04e76e9c2d12c2d4ee97508d7ebab0433431250 SHA-256: 12db5e4f1bc52e1feea235e5b68d91f0c599787d5e478e62f7043d818270bfaa
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs hosted on potentially compromised infrastructure indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b579df94161---nozefasigewudorimok.pdf In PDF document text
    • http://sochistandart.com/ckfinder/userfiles/files/66253640872.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/jb8cgtd1r2t4dps2jjhsu91bl2/sawebusifasamoripuwewabe.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/nejizipunoxut.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f268419dd4---rakajoleb.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1fff890d3---54530389573.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/394707f0d6fb8085813bd3f34b4f21af/miduxobiritokujidafugu.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/kilijexu.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/83167c2bb650c33082f38616bb4484ff/41357598434.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d2ffd068a6d1d5a8c2e08cab9e8fd4d8/mukixoxolixenejebu.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/51165143606.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/lavewegibatuzemoriludujut.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878f706af7a---61027441533.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/2e393de9b375d509334c7c6933cc3191/69724817289.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/tamajikibasevenatojuxitag.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/svdrjiqcnord85ovnia9e7a1ne/64538455673.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/v5010nm5rbvm0hiadi3r4u5kk2/sobuzatu.pdfIn PDF document text
    • https://coil.hk/upload/files/wufugigoxumexoto.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/gopejabolen.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/sovemaposepazagofi.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/filafunodo.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9b9f71513---derajibok.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54a3b1ad4f---zapizuli.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/27827786766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=atoms+and+molecules+answer+keyPDF 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_off00017923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17923 10812 bytes
SHA-256: 51070691b6767ae90a39f357eb1d6ba940f024bb5bb6c89367aeca3b7d40a391
font_01_sfnt_off00019239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19239 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001aa4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA4B 18240 bytes
SHA-256: 1c00ceec892192475abb8f6ed9bcb4e683961fc413ac0b0cc49c06d55bb63752

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