Malicious PDF — malware analysis report

Static analysis result for SHA-256 9793a165d3180e30…

MALICIOUS

PDF

76.0 KB Created: 2020-11-10 01:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2a48b9debba8e065a51ecb37b984f62e SHA-1: 9b32c6bb7b5c22a22ee1adb4ebefd07ea70a6e9b SHA-256: 9793a165d3180e3018dfa2512beeccda2621ac5f0c5b8c2324f7df67e716a627
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?keyword=arcade+basketball+unblocked PDF link annotation
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/6281626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5fa872eaddfaa.pdfIn PDF document text
    • https://tenigirexono.weebly.com/uploads/1/3/4/6/134645883/taxuravexalodifejiw.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/jagagifudeju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f98be7ebce29.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/jinabom/naming_bicyclic_compounds.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/78268792346.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/8942137142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0fbbfe-9b46-44d1-bdb5-291ae85a531a/10288738633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48a27075-02a7-45cc-b598-d89457f624a0/honda_cbr_600_repair_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf624ce5-c401-4073-9b06-d1528bfd0282/jiruwusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b6c665-cad2-4acd-9895-0441ea742ca6/gunplay_active_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ff4960-81a1-4787-a978-dee7a0cc5b43/34405983839.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC00 5128 bytes
SHA-256: ab6a9de924e1c67431a7c8facaf64df42034db27b6d45a0ec7f05359f94dbfd7
font_01_sfnt_off0000dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7C 9984 bytes
SHA-256: 3708b8d5b5f0cd238838b3d85fbec9bba28be619f960bcd8ca092f45a2adc84b
font_02_sfnt_off0000ffc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC6 19728 bytes
SHA-256: ef354a9e8e7ab8f8e8929d32c4e38a29cfdb35b1925660755c3374494daabea6

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