Malicious PDF — malware analysis report

Static analysis result for SHA-256 063f38cf90873a9f…

MALICIOUS

PDF

81.4 KB Created: 2021-02-09 22:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1a1e73a37b2a6386d213f2d3c7ab643d SHA-1: c0272a4c328cfefeec01ce83f255540728712aea SHA-256: 063f38cf90873a9f534e42ecb753af11aa03cdfbf43c435856979c37df4cff8e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to exploit user interest in free software templates.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/aws?utm_term=free++adobe+after+effects+cs6+templates PDF link annotation
    • https://cdn.sqhk.co/reretukida/zhggihc/24459036879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_6010547715ab2.pdfIn PDF document text
    • https://cdn.sqhk.co/gesafafo/3biidif/zinageguzazosifazarelu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484114/normal_600919d15741d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411918/normal_60055814a9f52.pdfIn PDF document text
    • https://cdn.sqhk.co/totuzilexif/hfhakie/gotidugamofetedejozot.pdfIn PDF document text
    • https://worojipe.weebly.com/uploads/1/3/1/3/131382243/jipixifarusak_zalewamokovavad_lelup_zesimoruvuwotu.pdfIn PDF document text
    • https://fafodedok.weebly.com/uploads/1/3/4/6/134602811/6661602.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/BR1gfFn/my_airtel_number_given_to_someone_else.pdfIn PDF document text
    • http://shop50off.info/wetuluzexc5zzo.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/9a8ad6a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_5fd98b113cd67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391317/normal_5fe2536ad129d.pdfIn PDF document text
    • http://samelike.site/9264784537lb9e.pdfIn PDF document text
    • https://luvidobanuneje.weebly.com/uploads/1/3/1/6/131606009/1255764.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/diwijusepedegij.pdfIn PDF document text
    • http://samozanyat.info/effective_communication_skillsvnr19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/wusoxakig.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/jevil_battle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/83088305673.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/diadora_n9000_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/afrikaans_love_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/84914179849.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/bowigotemufominu.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/63648781467.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 5548 bytes
SHA-256: 5f5c82da5a38d2265f30e582360c00847855c46d7004c82161808c97b8c65a6b
font_01_sfnt_off00011321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11321 10684 bytes
SHA-256: 1abe8eb61953f33e456df90eff84e30e1824807895358fa21fc8a761efc69029

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