Malicious PDF — malware analysis report

Static analysis result for SHA-256 578ed14f80cd3975…

MALICIOUS

PDF

93.5 KB Created: 2021-07-27 07:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: be53ff2d104eceffbd428d68c2af8549 SHA-1: c90343f214ed2bc9b2988e0fd049dc93de86c8af SHA-256: 578ed14f80cd3975dfadc27806b65bf328f7c93918bccd5d0a053fc1614bfddd
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm hosted on compromised websites, designed to redirect users to potentially malicious content. The presence of multiple links on disposable or compromised hosting suggests an attempt to distribute malware or phish for information.

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://beldapin.com/calisma2/files/uploads/puninarazumetezonufe.pdf In PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7c752a2b6---velunopozilaxukoraxokunaw.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/m7suvcloe50fioul6dovu1r3co/24332098545.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/10831928809.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16080583a8a43b---56024123200.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/zuwamifutepafekatizi.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a109ae064ed---tupigomudawavuviwipixes.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210717220353.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/81501190898.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2862d3996---2548014928.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/19623906145.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/bumofuruwurida.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/9dd26de86248058e1c18319527287b23/garir.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/85909629656.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/95376190611.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/forimedigexaper.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9894b7c4cf---52502103907.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/fve37h4i4ccrcou1sodqjk34lm/5416718195.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/ded13af101756065ce7533a843b526f8/36182006770.pdfIn PDF document text
    • https://123natura.com/stockages/files/sunogazonufupofumuje.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/3d03nkugld5otln5oc681safcm/88618092416.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/zinokutad.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/00193385ef68c27fb2f9999cd8ae7f9e/mabogezejakimisozelivixot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=%C3%BCcretli+kitaplar%C4%B1+%C3%BCcretsiz+indirmePDF 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_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D05 19608 bytes
SHA-256: c353d09ba04d080f6c2c69f0527edf5a0cc2b05e2033d23c45029f4bb155545d
font_02_sfnt_off00014d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D60 11048 bytes
SHA-256: 9b72d2358cdcf05f9a2a754a76efef4dda984bbfd1efdfce658b26a66a844bd6