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)
MD5: ba673fca0d77f341ff78bfbbd7f3b0b6 SHA-1: 276474d242d4131c7e686a8d73c00740561fb643 SHA-256: 4cd24e6ba5eff94b5d99f6359c7d5a8b093afef1461d12819ae9a75b356e311c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious content, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
    • http://hrushch.space/928303435oitw1.pdf
    • https://cdn.sqhk.co/rufebumu/goNlgcq/into_mirror_mod_apk_download_revdl.pdf
    • http://bibuzikufaje.mygamesonline.org/xajazu.pdf
    • https://xunimolozabipos.weebly.com/uploads/1/3/2/6/132681728/waxujog-zipup.pdf
    • https://rojanekawuveruj.weebly.com/uploads/1/3/1/3/131380666/4144996.pdf
    • https://cdn.sqhk.co/rotonoba/7nxiimg/mitejenodirezopudabinebi.pdf
    • https://cdn.sqhk.co/gibewuzavi/hcjgjEk/96060205129.pdf
    • https://muwubuzegutan.weebly.com/uploads/1/3/4/6/134649477/f6ab799bf4.pdf
    • http://jitoletesavi.iblogger.org/rhetorical_strategies_essay_for_ap_english_language.pdf
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/242237ec3bb31b.pdf
    • http://fbdirect.site/xirumadsr1h.pdf
    • http://siviveko.getenjoyment.net/37687541865.pdf
    • https://cdn.sqhk.co/sawijewabob/5jbrZSC/4k_video_player_for_pc_windows_10.pdf
    • https://kumumejetosen.weebly.com/uploads/1/3/0/9/130969188/wuvijilolemex-vofatunow-mexuruze.pdf
    • http://samafutanub.mypressonline.com/89353096047.pdf
    • https://cdn.sqhk.co/puwukuwos/iehchjX/56983445505.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://magegefopo.atwebpages.com/60996468746.pdf
    • https://uploads.strikinglycdn.com/files/6d1ea57a-21ed-42e3-b4a1-e8dc234d3276/78804705260.pdf
    • http://keberefan.rf.gd/all_pc_shortcut_keys.pdf
    • https://uploads.strikinglycdn.com/files/9099b93d-b918-411c-96b8-f97bde566a03/how_to_build_a_house_simple_steps.pdf
    • https://uploads.strikinglycdn.com/files/2a6d4550-5f16-47f8-adc5-d528f507360f/xujoxebebizofomajubaguz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

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

Open this report in the interactive analyzer, or submit your own file for analysis.