Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a1d69a93a6c03d…

MALICIOUS

PDF

66.7 KB Created: 2020-11-23 12:35:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 935733f19b5d01ccac49851b690f4760 SHA-1: 9b0722de6230264d248bcb50281ef78e2dd41796 SHA-256: d2a1d69a93a6c03d03936bfe6a19469c3ba12995fd282745f6658c85728d2ebf
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links, with one critical heuristic identifying it as a redirector link to malicious infrastructure. Another heuristic indicates a link farm, suggesting an attempt to distribute malicious content or engage in SEO abuse. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

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
  • 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 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.
  • 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://cctraff.ru/123?utm_term=delta+28-160+bandsaw+blades In PDF document text
    • https://vafeperaj.weebly.com/uploads/1/3/4/5/134586379/venukifisuxarutumepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5f9eda13d6d74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5fa2ba4ea55c1.pdfIn PDF document text
    • https://gasagadivegolix.weebly.com/uploads/1/3/4/4/134488570/8280289.pdfIn PDF document text
    • https://xirofepomare.weebly.com/uploads/1/3/0/8/130814083/62136e87e.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://s3.amazonaws.com/xewamejixolefaj/medical_report_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/comedy_of_manners_books.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/check_writing_template_for_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/37033892406.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/rikumujokusijonobawiforiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/30493293287.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/gujarat_budget_2018-_19_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/fufaxekes.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/memogenilikevigolid.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/oscillatoria_characteristics.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/taguxegep.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_off0000b92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB92B 5292 bytes
SHA-256: 44721f20617096d61cbf113e34437a8849473558ed6a699fb3e19d36fa788adf
font_01_sfnt_off0000cb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB43 10728 bytes
SHA-256: cc603d5b324aa34164bef62545ec9de106fd91fa24f04f5b3eff61dca3ae6ad2
font_02_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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