Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f22bf476d410852…

MALICIOUS

PDF

85.1 KB Created: 2021-03-17 16:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0a3405e637a1f21785f1a7ca097f1d25 SHA-1: 1e1e72228c0f05b4ef19397645fbe83528154338 SHA-256: 8f22bf476d410852cdeb3b34d491645dbffcb81549e1236b6bc0f5de0ceb92e7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. 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 0.9992

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://fokemale.ru/wix?keyword=direct+energy+door+to+door+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366048/normal_60518384020ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366956/normal_5fc938f4cc202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fe44672ea21d.pdfIn PDF document text
    • http://xodufaviwez.iblogger.org/awaken_the_giant_within_full.pdfIn PDF document text
    • https://vemekejafor.weebly.com/uploads/1/3/4/0/134012611/ec83f943a71b839.pdfIn PDF document text
    • https://cdn.sqhk.co/bibikodazit/jhIjaEA/mexitefagerifemiragikazil.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/e3haKhb/1460224328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_6004707b9ec1d.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/jcicFbN/pac-_man_games_online_free_for_play_now.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/dinakesiv.pdfIn PDF document text
    • http://zoxenejuwu.iblogger.org/pezumonokonijidako.pdfIn PDF document text
    • https://debimagobu.weebly.com/uploads/1/3/1/6/131637583/5281501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_60473f7ab24ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ececae0b-1312-4a4c-959a-117928b3d478.filesusr.com/ugd/e6721e_b8fc03142c2647bfaa439b44169cbbce.pdf?index=trueIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_3fbbf8e336854a82be2d5d9983608b65.pdf?index=trueIn PDF document text
    • http://sekovukubetib.epizy.com/corporate_brochure_template_free_indesign.pdfIn PDF document text
    • http://meduzifovum.epizy.com/cartoon_photo_editor_app_apk.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_d58bc1f10ed24063b900bccaf7626b92.pdf?index=trueIn PDF document text
    • http://musizaxodolof.epizy.com/pericarditis_treatment_guidelines_2015.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_2deb814e827546be9455c7fc620843b3.pdf?index=trueIn PDF document text
    • http://gigigij.rf.gd/najuzazom.pdfIn PDF document text
    • http://bogurivesinoni.rf.gd/54980234927.pdfIn PDF document text
    • http://jowelijarav.rf.gd/kenmore_f21_code_how_to_fix.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
    • 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_off0000faf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 5308 bytes
SHA-256: 7d3ac5d25d3bada86a2dadc5531c6737fb7c8edecbbaf4aa168c8fc7b5cfb1d4
font_01_sfnt_off00010d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2C 10628 bytes
SHA-256: c1175bb835d0c30c45bf467ee540de828ce70c0b298434b226ca4415c5b21bc3
font_02_sfnt_off000131b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B9 16096 bytes
SHA-256: 2dff1fc3e5bf1049a512ca2ab3d4448021a5e4676c0c9a63fbc3d390c83797d9