Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9c5c5dacf71823…

MALICIOUS

PDF

99.3 KB Created: 2021-09-03 01:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 949e25d37f5a793dd6aefcf9ccea4f08 SHA-1: a75eb7badcc93a9a53e5b6134fa9c7e663d70528 SHA-256: 2b9c5c5dacf71823e731f6951e6eec6c86cf1fee5a8818d2113bfe421f618678
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links are consistent with a phishing lure, aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=aide-m%C3%A9moire+-+macro%C3%A9conomie+pdf PDF link annotation
    • http://mojahotels.com/ckfinder/userfiles/files/1730817244.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086fc844be49---11367204368.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/64941643294.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607519e75173e---kefilijenobodi.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/pewesowezeporimujo.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d991599a7a---vozageke.pdfIn PDF document text
    • http://santeh.md/img/files/ruloguwo.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/bowojusikazekurafilaxuvaj.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/80au9ic480c9mud79biojatggv/ziromusozipakavawegowunu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161067ba7b7296---bewolubebususek.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c679249181a---27989995126.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/15089433450.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8719831c3---puwavitinubawu.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/9705007643.pdfIn PDF document text
    • http://retailcop.ca/files/33167112820.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/bemul.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/qlul6kqvklitcsdutbi2l8f1b4/balilonanok.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/fa29d06219f336646ecc088996bff01f/66239167606.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/94653066616.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081045f44ce4---kukumoketotawokoxenose.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/60118660370.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607369a1b5303---87284449943.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_off0001197d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197D 20732 bytes
SHA-256: 3fdb8655c94348f6df579267617b297b31dd67de4577fe436b0363686d945863
font_01_sfnt_off00014d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D70 10640 bytes
SHA-256: 9603e75ca7cb0eb5050af335bdd8600f30824370bff164341a12907f4ff2bfba
font_02_sfnt_off00016573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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