Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd24e6ba5eff94b…

MALICIOUS

PDF

79.4 KB Created: 2021-03-16 17:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ba673fca0d77f341ff78bfbbd7f3b0b6 SHA-1: 276474d242d4131c7e686a8d73c00740561fb643 SHA-256: 4cd24e6ba5eff94b5d99f6359c7d5a8b093afef1461d12819ae9a75b356e311c
186 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous external URIs pointing to various domains. Heuristics indicate a high likelihood of malicious intent, with ClamAV flagging it as Pdf.Phishing.Trojan. The presence of many disposable hosts and the structure suggest an attempt to distribute malicious content or phish users by overwhelming them with links. No scripts were extracted, but the PDF structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://botokaw.ru/wix?keyword=waren+sports+supply+year+end+worksheet+2017 PDF link annotation
    • http://hrushch.space/928303435oitw1.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/goNlgcq/into_mirror_mod_apk_download_revdl.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/xajazu.pdfIn PDF document text
    • https://xunimolozabipos.weebly.com/uploads/1/3/2/6/132681728/waxujog-zipup.pdfIn PDF document text
    • https://rojanekawuveruj.weebly.com/uploads/1/3/1/3/131380666/4144996.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/7nxiimg/mitejenodirezopudabinebi.pdfIn PDF document text
    • https://cdn.sqhk.co/gibewuzavi/hcjgjEk/96060205129.pdfIn PDF document text
    • https://muwubuzegutan.weebly.com/uploads/1/3/4/6/134649477/f6ab799bf4.pdfIn PDF document text
    • http://jitoletesavi.iblogger.org/rhetorical_strategies_essay_for_ap_english_language.pdfIn PDF document text
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/242237ec3bb31b.pdfIn PDF document text
    • http://fbdirect.site/xirumadsr1h.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/37687541865.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/5jbrZSC/4k_video_player_for_pc_windows_10.pdfIn PDF document text
    • https://kumumejetosen.weebly.com/uploads/1/3/0/9/130969188/wuvijilolemex-vofatunow-mexuruze.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/89353096047.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/iehchjX/56983445505.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magegefopo.atwebpages.com/60996468746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1ea57a-21ed-42e3-b4a1-e8dc234d3276/78804705260.pdfIn PDF document text
    • http://keberefan.rf.gd/all_pc_shortcut_keys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9099b93d-b918-411c-96b8-f97bde566a03/how_to_build_a_house_simple_steps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6d4550-5f16-47f8-adc5-d528f507360f/xujoxebebizofomajubaguz.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 5724 bytes
SHA-256: ed397fd9dcc8825f448b093afda6033fb084e95da1bf34086091ed7c0074e4a8
font_01_sfnt_off0000f624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF624 10688 bytes
SHA-256: 0052c9496059d47dbbd7abcdba7b20fbed67fe616f325e94658b92b499441f75
font_02_sfnt_off00011abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABD 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d