Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1d06970d0eb740…

MALICIOUS

PDF

73.0 KB Created: 2020-11-19 14:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a5090944e41e80fcb258d4b3d3f5c637 SHA-1: 3b3707d13915a01abb127722c67f067c2191f414 SHA-256: 3a1d06970d0eb74055a3686c3d91b7bcf0afb5f6f86e220df91dcbb7217f052b
184 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 as malicious by multiple heuristics, including a critical finding for a malicious redirector link. The embedded link, 'https://gettraff.ru/123?utm_term=convertidor+de+pulgadas+a+mm', is a primary indicator of malicious intent, likely leading to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to unit conversion, suggesting a lure to entice users to click the malicious link.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?utm_term=convertidor+de+pulgadas+a+mm In PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/miwiwovavexidi.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/xenulu.pdfIn PDF document text
    • https://gajokemijibefe.weebly.com/uploads/1/3/4/4/134467094/167170.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/tofilixeludofaxofujo.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/ropoforabejude_buvusulipir_tujubitodave_gulovalubeb.pdfIn PDF document text
    • https://xomilazarega.weebly.com/uploads/1/3/4/5/134511507/24e3ce7015c8e.pdfIn PDF document text
    • https://jedufopev.weebly.com/uploads/1/3/4/4/134490540/tamosukerivasuwofi.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/janefexiridaxom.pdfIn PDF document text
    • https://xukutejupu.weebly.com/uploads/1/3/4/4/134487517/52b30459.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/85e6a54a-b965-4bfd-80b7-86a57b1e8a19/pick34_original_tic_tac_toe_pick_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47f04f8-208e-417f-8afa-98caa5d9858c/a_taste_of_blackberries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad06d0d-b253-4a1e-bd06-4d65d5d3af43/19247214208.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/pepupowelirodo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD027 5244 bytes
SHA-256: 4d58ba5a183063a33f91f237adc62c211adaa6f5dc9cafb4654a63b5ace74aec
font_01_sfnt_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 11420 bytes
SHA-256: ae28ad1a0873f9d86621de16d85d31919e9250f8664d8196e1b173a97d363df6
font_02_sfnt_off0001072f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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