Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a94bd9553d512b…

MALICIOUS

PDF

87.8 KB Created: 2021-04-07 17:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 29ab6e47290729339710081c25326049 SHA-1: 20039ba7edd72aa1644b041cbaabbd6e420e6a2d SHA-256: 98a94bd9553d512b496ae19061c383fb0526efa8e404522c72c39e7226df7455
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=a+streetcar+named+desire+character+analysis+blanche PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417023/normal_6025c84abe99f.pdfIn PDF document text
    • http://sesulup.iblogger.org/pelebowevep.pdfIn PDF document text
    • http://phillipen.online/pivovitivusutomozijinobygoo.pdfIn PDF document text
    • https://nenuxigibasus.weebly.com/uploads/1/3/4/6/134694542/podokenubiwalaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_6030dfc125d7a.pdfIn PDF document text
    • https://xewimimami.weebly.com/uploads/1/3/1/8/131857815/402ae3a5957a989.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/kibirikavz115.pdfIn PDF document text
    • https://lupexepiw.weebly.com/uploads/1/3/4/3/134318885/2075745.pdfIn PDF document text
    • http://igbusinessabouthelp.com/cds_1_2019_notification_download58vbn.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/dapepuxomi.pdfIn PDF document text
    • https://pufopobumosuv.weebly.com/uploads/1/3/0/7/130776602/2120375.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446382/normal_5fe4fc65a7995.pdfIn PDF document text
    • http://getbuiss.online/xogewibonabelotulebarakubeoscu.pdfIn PDF document text
    • https://jexetapi.weebly.com/uploads/1/3/4/3/134345775/af9b5406.pdfIn PDF document text
    • http://wrestling-mma.com/86991942618ci12w.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
    • https://s3.amazonaws.com/benubapopikaj/metformina_500_para_perder_peso.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/76671643450.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/vurajigirogaxolowutuxuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/hiv_aids_positive_report.pdfIn PDF document text
    • http://sebiwafexudezo.rf.gd/google_local_guide_level_6_benefits.pdfIn PDF document text
    • http://kesowodo.epizy.com/boston_university_campus_map.pdfIn PDF document text
    • http://nolepukopele.epizy.com/nordictrack_cx_990_elliptical_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/43970304552.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_off0001104a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104A 5088 bytes
SHA-256: f047d2a6e067485f9620b566d1bb0732c57cae1a193bbaac01e58f318de55fbd
font_01_sfnt_off00012159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12159 9840 bytes
SHA-256: 96831a16ff093b4840ddd9495cfd43fd7f416022710bc08992c32a211689d7be
font_02_sfnt_off000142f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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