Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc625b8fd0d6045…

MALICIOUS

PDF

67.9 KB Created: 2021-04-01 10:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7a0fcf7687f56641f9a480156c4cd903 SHA-1: 56c9f5ecbcdbccb212bed8f3fef7a4d7b42f6d84 SHA-256: bcc625b8fd0d60457e212681bddf06ab60cd3b0f94dbe115262c154ad1385d40
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=reflexiones+diarias+videos PDF link annotation
    • https://korumarivaz.weebly.com/uploads/1/3/4/5/134506991/xulezasib.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/2363132.pdfIn PDF document text
    • http://wigevopane.iblogger.org/luxipowuxaw.pdfIn PDF document text
    • https://pezosoxebigaxox.weebly.com/uploads/1/3/4/3/134337327/junagopovex-liraxiwuxovide.pdfIn PDF document text
    • http://itdomen.fun/43734350432qp7fm.pdfIn PDF document text
    • http://cosmosqrab.online/vipadow1t5.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/wshjaij/tiktok_star_drowns_in_ohio_river.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/gcDijfM/4751486568.pdfIn PDF document text
    • http://zejenaxudemato.22web.org/exercices_sur_l_adjectif_qualificatif_pithte_et_attribut_ce2.pdfIn PDF document text
    • http://compte-cmbretagne.best/bupujoxenuradawojememixubdbg4.pdfIn PDF document text
    • http://sbrf.link/77010353055jat8i.pdfIn PDF document text
    • https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/wulafefiruparos.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/c60f6b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rivowotow.epizy.com/free_alphabet_writing_worksheets_for_kindergarten.pdfIn PDF document text
    • http://fisuwadufojotu.rf.gd/zenuwitanizibukefimukili.pdfIn PDF document text
    • http://nukigisadowuwe.rf.gd/dovozakavamizo.pdfIn PDF document text
    • http://webekilijonelew.epizy.com/5809000524.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDE 4744 bytes
SHA-256: d877ae09e0217c5e54409c5d33d71a84691f263075e23d43c2b06b466e0d2dc6
font_01_sfnt_off0000d00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00F 10660 bytes
SHA-256: 591468b298cb91b3b44b9cbc2db57085e3389522b8723382d93a30a9fbc4dfd7
font_02_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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