Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd1abb11c29da7b…

MALICIOUS

PDF

77.4 KB Created: 2021-02-08 17:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3b81f85a9471f76303b292621efaa016 SHA-1: 5076b6cdb78596b8fd55e2b86891540bb4a0b68d SHA-256: 8bd1abb11c29da7baa3c5626311c3f290e694fcb9757e36a88b2178a9c322397
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/aws?utm_term=template+after+effects+intro+free PDF link annotation
    • http://tugrull.com/750640807973xkva.pdfIn PDF document text
    • http://vezerfa.xyz/96451843180vnxto.pdfIn PDF document text
    • http://nigma24invest.online/85833401897qkqhd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_601b504c65d69.pdfIn PDF document text
    • http://ludokebisiw.iblogger.org/cubecraft_report_bedrock.pdfIn PDF document text
    • http://xogezile.66ghz.com/xarowogejojirumipitu.pdfIn PDF document text
    • http://exampl1214.com/bass_guitar_pentatonic_scaleswvd86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488560/normal_5fc687e67be3b.pdfIn PDF document text
    • http://paganel.world/24369976760z060c.pdfIn PDF document text
    • http://podjem2.club/zugenepoq94z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491670/normal_6004529cb1bb5.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://xuxejoser.rf.gd/video_editing_free_app.pdfIn PDF document text
    • http://nadiripu.epizy.com/schedule_template_canva.pdfIn PDF document text
    • http://rarejis.epizy.com/bible_apk_tagalog_english.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/mipovutatefefixuzijef.pdfIn PDF document text
    • http://zazisuj.epizy.com/bloody_roar_2_playstation_apk_1._4.pdfIn PDF document text
    • http://pifaramurul.rf.gd/walden_thoreau.pdfIn PDF document text
    • http://gaxomin.rf.gd/suzutumuwudesemakesixene.pdfIn PDF document text
    • http://kimejuj.rf.gd/fawazi.pdfIn PDF document text
    • http://paxubar.rf.gd/53441583960.pdfIn PDF document text
    • http://vomogowejupilu.rf.gd/jafemabemapib.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_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 4900 bytes
SHA-256: 18869dfbbccd5835702ed3e90a92f4698214006fc9a5a70477908aab145cc204
font_01_sfnt_off0000f5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EF 10548 bytes
SHA-256: 0b3d8a79ad5ea1766e69b22f3a7e21c50557935e9739bf4bc705f0c726e89f25
font_02_sfnt_off00011a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A02 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.