Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2489c429567b3e…

MALICIOUS

PDF

87.3 KB Created: 2021-03-17 23:10:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4926af8060059e3f2d6b29f84514da21 SHA-1: 727f1e84fcaea0a0077e50ceaac5db7368aae9b0 SHA-256: ee2489c429567b3e2b16cd3e8c050dcb0d1abeed00d592769e5e9809c01eec06
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation or directing users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=papa+louie+pancakeria+rank+15
    • https://wegejazibeb.weebly.com/uploads/1/3/5/3/135305894/9bf58d41.pdf
    • https://cdn.sqhk.co/lunabati/a87AWgc/rap_song_quiz_2020.pdf
    • https://cdn.sqhk.co/zojixemem/jjzLhjZ/5020752800.pdf
    • https://static.s123-cdn-static.com/uploads/4369514/normal_5fec8b1c9f025.pdf
    • https://cdn.sqhk.co/xanuramalu/ahfhajg/wakep.pdf
    • https://cdn-cms.f-static.net/uploads/4417669/normal_604e1c3491de8.pdf
    • https://cdn-cms.f-static.net/uploads/4377936/normal_60406b05ab862.pdf
    • https://cdn.sqhk.co/gudijupimeb/XiiFij2/41897868257.pdf
    • https://cdn-cms.f-static.net/uploads/4465255/normal_60157be540aac.pdf
    • https://vosuzupitozom.weebly.com/uploads/1/3/5/3/135313705/jujevirujazonew_bikusukepupukap.pdf
    • https://cdn.sqhk.co/vasibejovej/Iibhhjh/2015_thai_hypertension_guideline.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fusopoxipo/security_self_storage_tryon_road_raleigh_nc.pdf
    • https://uploads.strikinglycdn.com/files/dc8e360f-29ab-4b18-90d2-731d23b26657/1213075889.pdf
    • https://uploads.strikinglycdn.com/files/98a3c65e-bd92-435a-ab2d-84dda3f055f8/rival_crock_pot_stoneware_slow_cooker_instruction_manual.pdf
    • https://s3.amazonaws.com/dogazisuze/percent_of_1_rep_max_chart.pdf
    • https://s3.amazonaws.com/gurowozenupifi/adobe_xd_templates_app_free.pdf
    • https://s3.amazonaws.com/legobegutulo/35717937446.pdf
    • https://uploads.strikinglycdn.com/files/2567ae48-e5ec-4a95-b2c7-391ffe824738/what_does_a_baby_spotted_lanternfly_look_like.pdf
    • https://uploads.strikinglycdn.com/files/6bc3be0c-0e14-4b96-8b5b-f3cbf9a6ebca/rirene.pdf
    • https://s3.amazonaws.com/tiniruru/44161739188.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001132f.bin
12dee853960e9b23c274d3250462b79fd1fc248c9702fd3000cf0718a20265d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1132F 4992 bytes
font_01_sfnt_off00012443.bin
495019b1d1ff18553f1416fde705bf7bc3e9f714a8c585ff6a00142e46879b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12443 13960 bytes

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