Malicious PDF — malware analysis report

Static analysis result for SHA-256 93974a9cb037f228…

MALICIOUS

PDF

82.9 KB Created: 2021-03-01 09:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 47ba7ffc9829233e679be7980d2cbbca SHA-1: 152e1b82b444fdc53a13c46f4371665f7f24ac5b SHA-256: 93974a9cb037f2286ab80bc01df7e3ebcb8f6304fd5f37184fa03ba4a8c04b5e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=g4+strain+sunday+goods PDF link annotation
    • http://mebevevi.mywebcommunity.org/does_the_vivofit_jr_2_have_gps.pdfIn PDF document text
    • https://rixatesar.weebly.com/uploads/1/3/1/8/131871899/sibasiwezonot.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxiwugo/8N7hfXw/bilubuvaluwil.pdfIn PDF document text
    • http://milanbeachs.space/fetemukilk7pp5.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/93580436196.pdfIn PDF document text
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/ragizaxosozefawag.pdfIn PDF document text
    • http://contact-git.top/zetanemajulugoxedobarr7y0c.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/ml_a_gr_calculadora.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/fajujiju/33633940005.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/animated_characters_wallpapers_for_android.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/luseduxizavasibat.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/healthy_and_unhealthy_relationships_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/2007_chevrolet_impala_engine_3.9_l_v6_ltz_for_sale.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_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 5180 bytes
SHA-256: f62627ece596f2895aae9c2545abea214768414d26a65e4dfcff8bb3a3cb4c46
font_01_sfnt_off00011a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A40 10768 bytes
SHA-256: dd24c142a66e2acb491d22686cbd4d2c3914cb02a0685a006d9dc03537b3564c

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