Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d48d991ccc2ebdd…

MALICIOUS

PDF

105.7 KB Created: 2020-11-09 22:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7da1c7b4a8825fb4f4f4b051872fcaa2 SHA-1: da986b7e40622940ee43e26a20baf15177804307 SHA-256: 2d48d991ccc2ebddfeca8b4b44d1a6b78897d673df48113763cf50d83d8e2a93
204 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. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?keyword=dbz+devolution+hacked+online PDF link annotation
    • https://zatafepe.weebly.com/uploads/1/3/4/0/134000007/413810.pdfIn PDF document text
    • https://vovejurumek.weebly.com/uploads/1/3/4/6/134644047/6baf4ca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f8712ae890e9.pdfIn PDF document text
    • https://gidujinogojavu.weebly.com/uploads/1/3/4/0/134096303/7818412.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/topixovenojosan_supebo_xekafimeb_nilujam.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/nofimotibu.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/9276260.pdfIn PDF document text
    • https://bafobuxog.weebly.com/uploads/1/3/4/3/134316473/rekanax.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/levumoduf/28263929763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1751a3-2d44-4d83-a1a8-853d8b65667d/manual_calculadora_texas_instruments_ti-30x_iis.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/91435579692.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/pul_fabric_by_the_yard_waterproof.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/vomozuxegadelafaxojoduwe.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/62120330854.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/trainz_simulator_12_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/95712380246.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001610b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1610B 5064 bytes
SHA-256: c481b75f7d2002e3a0cb92a41508ff091e6cde61b2e1d3444aec412b65adc11b
font_01_sfnt_off00017253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17253 11716 bytes
SHA-256: 1dc41bfacc8b031a3dc6763ddc4cbb27b91e7f8d770aa2eef976b94baa4833d5

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