Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29da9246f5bf16f…

MALICIOUS

PDF

92.8 KB Created: 2021-02-21 02:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a27adc0e68f42aeea48000928eb88166 SHA-1: 5b8526ea629b090a2bee6c65fe38c13df40b357e SHA-256: d29da9246f5bf16f0e63cfc9f0b48ef825e0aa96167ae13a3e92ea9d01416498
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9998

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://baarspo.ru/wix?keyword=pendragon+the+merchant+of+death+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375351/normal_5ff5f98257caa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448357/normal_601c873e34e93.pdfIn PDF document text
    • https://fezulenigi.weebly.com/uploads/1/3/4/4/134485980/172507.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/jetjc7v/cracker_barrel_thanksgiving_sides.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/djchb26/withings_bpm_connect_vs_omron_evolv.pdfIn PDF document text
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/4ba83e82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fe760d014519.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/fonazuzixagizir/new_hd_bhakti_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/autothermal_reforming_disadvantages.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/metimovizomijafezonekel.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/latest_bangla_fonts_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/end_city_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/94565592590.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/n_d_a_application_form_2019.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_off00012f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7F 5484 bytes
SHA-256: cf0dc121d9a38137c066375eafbe97efb5331d1ab809af48a777ff934442d01d
font_01_sfnt_off00014219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14219 10496 bytes
SHA-256: e3851221ff1d192f79c5eac802e29c10415a5919112fc5441164c8a06c0d0d5a

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