Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e9a78eeb02bd2c…

MALICIOUS

PDF

74.1 KB Created: 2020-11-11 08:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 90725a5a9c53767f3fa6c3c0e41af06f SHA-1: d84d9aee90a70fa378214046fb309c9428278049 SHA-256: d6e9a78eeb02bd2c2564fd86527a5e976834e8874c3f7a2ce7afe3d50d9a0533
222 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. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure 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 6

  • 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.
  • 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
  • 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/strik?keyword=kenmore+quiet+guard+3+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_5faa81ca31a5e.pdfIn PDF document text
    • https://pabenegoje.weebly.com/uploads/1/3/4/3/134348732/wojekipik_ketudetivarekam_barexuwibedi.pdfIn PDF document text
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/wepopokos-zuvazaru.pdfIn PDF document text
    • https://japiloxekafu.weebly.com/uploads/1/3/4/4/134480389/dff3deec9cb5e28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_5fa1fd7843e87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f97822e71543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5fa19fc6bf258.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/tetazino/lunikanagewu.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/balarama_malayalam_book.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/1999_kawasaki_mule_2510_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/mewilosebowuwowufanad.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/rand_mcnally_2020_road_atlas_national_parks.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/2010_toyota_prius_owner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/ielts_academic_reading_test_samples.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/lilagozorarusezadamepod.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_off0000e3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 5228 bytes
SHA-256: 6a175b412cca282414942bd6ac2daf0f2d7b31b88c602bc62d97f91965d9e82f
font_01_sfnt_off0000f59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 11404 bytes
SHA-256: 14b0d2be9bf32cb7407f734a134fe7ba11163ce555d61386a1ed475e73bfbd17

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