Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc5d92bf922e07c…

MALICIOUS

PDF

89.4 KB Created: 2021-07-26 02:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6c284fb7aac83b517bcf9e45d4bd1edb SHA-1: c57672e01ab2a82628c6db9028664bd08e30b787 SHA-256: 0cc5d92bf922e07c6ceea515426ec393a74109701630490ba669f2cc3362e5d1
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. These links are likely designed to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea4351bf75---novoworujejajijesagawepe.pdf In PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb39d54a14b42b8cd1c065f905c43f82/59657672324.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/ecf0815241083aa96d717106cd585a88/vumemesasu.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/975ce7c959225432a76ae4ceec4a37af/86024779143.pdfIn PDF document text
    • https://ekransamara.ru/files/misivujibanalib.pdfIn PDF document text
    • http://rinsacars.com/files/others/xuwonagofazuritus.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/zivigesodojilugamobuzalev.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/c8d2dc66648d9005fd5d40cea1385a4b/vobig.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/34125312069.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16088c1eb9220a---57624705609.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/dukoduxegogovaxor.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/38444869825.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae1882160---sasolofazedowuxujife.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/23775552401.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/rfvjp8ip0h737dc7q9r4q997ad/23830698385.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/26280989091.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/mamasatinofafila.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b4276213ce7370c03f14440a34dfdfea/9004875830.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/cnce47641oedpfsoc13rj77aet/58579977421.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/xizizonepabapifaligutuxak.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9110af8e1---87452752753.pdfIn PDF document text
    • http://bakerfamreunion.com/clients/1/13/13be4b03bdabdd3a133c3ee64ed6201b/File/jupebarig.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/vimepuxululavivoxonasiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=exercices+expansions+du+nom+3%C3%A8me+pdfPDF 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_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 19480 bytes
SHA-256: d8572f49dc2e079d4f744497b8b675cee410dcf27ceba205e5c6f07e6a5190af
font_02_sfnt_off00013af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF1 11148 bytes
SHA-256: b651f86e61660f0b88bae6e9c784728d08ece80b62f5f61d6fbe1ef5baa9f812