Malicious PDF — malware analysis report

Static analysis result for SHA-256 2995295e05a1435e…

MALICIOUS

PDF

65.6 KB Created: 2020-12-22 05:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ebe23da8ef684b50902cc70891d1514f SHA-1: b0c0dfd3984e3ebe56405e6cf6c81a93b733244a SHA-256: 2995295e05a1435ee52bb4b0d12a6cd0c555e9c228860ad2bf74323d7b51ab1b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

The PDF contains a large number of external links, many of which point to SEO-optimized PDF documents, indicating a link farm strategy. The primary URL, 'https://trafffi.ru/123?utm_term=how+do+i+print+sticky+notes+in+nitro+pdf', suggests a lure to disguise malicious activity. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=how+do+i+print+sticky+notes+in+nitro+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421472/normal_5fbec41eb1936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5f93421da9772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5fad53840e427.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fc7452322318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423715/normal_5fbf0b859c0c3.pdfIn PDF document text
    • https://fovenuratosoka.weebly.com/uploads/1/3/4/5/134582487/nitizener-tamiperaroziliz-ravumapuwisate-fapigemagulun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f8aaf8d9cd2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6585de07-359c-45d5-b0c6-86377c7c2272/tasewuminubosoripe.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/22672211092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1baaaf37-c67b-459d-b399-777667a2c5e0/75349939714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7054ed-acfd-43fc-b80d-af91b40ef04c/born_mens_shoes_black.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/xbox_360_s_manual.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

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F3 5124 bytes
SHA-256: e501cffe4397d95412ff2e6f1891dfe0a47b07b9014878fec26f601b7193c429
font_01_sfnt_off0000d593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD593 10452 bytes
SHA-256: 5b23621e0971484017f908193ac002b012b0fa1f51d709745f43887f69e57c3c

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