Malicious PDF — malware analysis report

Static analysis result for SHA-256 245a286f2ca867c3…

MALICIOUS

PDF

75.0 KB Created: 2020-12-28 05:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2b4ebff19df6b14c6fcbb10c11733002 SHA-1: 2aec04ff405f7a60f32b0a11afabc4d337b17f32 SHA-256: 245a286f2ca867c3d5d7a4237469c550b969b946e939931d69037c5a1554122b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a significant number of external links, indicative of a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafftec.ru/aws?utm_term=arduino+duemilanove+bootloader PDF link annotation
    • https://cdn.sqhk.co/zadorari/hcggUqA/tepoxirajodorutejiwab.pdfIn PDF document text
    • https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/sesawedagapuf.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/17ed8bf9-eca4-4b04-b331-3918c65a8ae3/kusufifefirezumirebo.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/clinical_anatomy_of_the_eye_snell_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/gleam_crossword_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/803a9258-390a-48fa-9c6c-5c74409056f2/44999936272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f071ed-b13b-4710-8196-d839fdace54e/61370067988.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/d_d_5e_charlatan_background.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd56d64a-c4a0-43a3-aa54-b4a31cede5e9/vajov.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/meeting_agenda_email_format.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 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_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 2960 bytes
SHA-256: 4253ce374f546ed82c0b962bfad5e193173c5af7311640f7068ccdda2cb38311
font_01_sfnt_off0000e8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 4980 bytes
SHA-256: ff1f3b07273d3c9ffea8879e56ce7002cac1f93738cfa20790557d4df6f551ad
font_02_sfnt_off0000f999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF999 11012 bytes
SHA-256: f5a4dbfff5bf47259cced40313d9c6b78f26322407829daed0ba850e97696e51

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