Malicious PDF — malware analysis report

Static analysis result for SHA-256 63caadc871080835…

MALICIOUS

PDF

85.4 KB Created: 2021-01-05 04:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cf12ad5e363ed50af7da69be2ec6b444 SHA-1: 84169fce92ed4515d824fd68f80fd9c6734e0c0a SHA-256: 63caadc8710808350e8e6e16a9392818cde6eda48c785aff59f28fd85b89b1f8
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector and another part of a link farm. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or malware distribution attempt. The presence of embedded URLs suggests an attempt to lure the user to external malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=juega+hide+online+y8 In PDF document text
    • https://judorobizud.weebly.com/uploads/1/3/4/4/134455398/8be91e.pdfIn PDF document text
    • https://mukokoloraji.weebly.com/uploads/1/3/4/1/134131612/e8d66.pdfIn PDF document text
    • https://tiparopodewab.weebly.com/uploads/1/3/5/3/135340776/6606223.pdfIn PDF document text
    • https://fekogekakoxoki.weebly.com/uploads/1/3/4/6/134625435/8c479027.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/bokexizometun/aatish_all_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/tlcharger_whatsapp_apk_nouvelle_version_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/zoledronic_acid_infusion_cpt_code.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/69286191973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e94516-0692-4daa-bff9-4e667493890f/leyes_ambientales_de_puerto_rico.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/it_chapter_2_pennywise_true_form_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/dofus_huppermage_guide_pvm.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/soundcloud_premium_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/27909248761.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/city_of_regina_leisure_guide_spring_2019.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 3356 bytes
SHA-256: 07e311f90794730ed9d3d75bd4b4d8239a9c463bd774d0a0fb5f2d1308e7df34
font_01_sfnt_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 4900 bytes
SHA-256: 530e4d7f2e820d1512276ba158049642d5d8d893ae45a62d5f982f83f262580f
font_02_sfnt_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 12444 bytes
SHA-256: 06d780cf73e06c816b34ede861de9d45e4d4d70ad2a2224adac77f5e61d0cc12
font_03_sfnt_off00012325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12325 16544 bytes
SHA-256: 88ca80124b0dae8e4545fae74748a695f9a8517fdb2fa7114537bdce0f2d6fec
font_04_sfnt_off000138ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138AC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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