Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ad8f95bfa96db0…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 18:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 993eb78a47a9df07a398cd99fa0d262b SHA-1: 7974d4987ec3442db8ea8b4d5496920913339155 SHA-256: e6ad8f95bfa96db0a4505770a36f1aed18a9830b5030d30c4698160e804a94d8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to lure users to malicious content. The presence of numerous distinct hosts and URLs indicates a coordinated effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b43e322801---78301742580.pdf In PDF document text
    • http://piemonteforyou.it/userfiles/file/6455451744.pdfIn PDF document text
    • http://co-mit.com/uploads/files/wizorofira.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/gcp7kkb5la1q2ni3s120fju16h/wadenuvebax.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/xorotetaposeminowebol.pdfIn PDF document text
    • http://beiks.info/public/file/71605180772.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f2b0827659946d7961ead57b571c1525/nafiwofipotavanak.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/45968893753.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ecbf8788d---29483402660.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/6a56889c0d47c484571bbb9e876e6ad8/45247917634.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1934c47a9---xanegorejakax.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/818e5af949c08f800aa9fb485d664d49/tatirosawosolono.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ua88bf0ekh78ns0l5gmss93fd4/90389399249.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/70518636225.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/wujuwixikejowagi.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/losamalutulazimevitok.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/kiliboxapafotubetazadeb.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/28661475694.pdfIn PDF document text
    • https://mmtours.si/uploads/xamifekosumot.pdfIn PDF document text
    • http://temple.mo/userfiles/file/mizorik.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c70130e549e---25819187050.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/lurubogumuposawub.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/6040306377.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1f336eefe---biwerulifajomefowajov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=2012+range+rover+evoque+repair+manualPDF 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_off0000d759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD759 10840 bytes
SHA-256: 2befb173abe6898fd696c176e7a99c68b54af9b59eb63f36fb3118045a83f4e8
font_01_sfnt_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001081c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081C 17660 bytes
SHA-256: 4bc37920059d54080d92699538fc2cc49493fb6bea4ecb7bf16256d3e3433a65

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