Malicious PDF — malware analysis report

Static analysis result for SHA-256 358dd93580fa562c…

MALICIOUS

PDF

89.1 KB Created: 2021-05-25 02:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ccb0ccb8cc4085c9578889a321818d45 SHA-1: 711fdf42bce7590471ada46c0571aa71738dbc64 SHA-256: 358dd93580fa562c186ad2ffc08232e9ea7f985f4e5880305d3783ecfa7f9177
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://resalured.ru/strik?utm_term=clash+of+clans+town+hall+7+base+best+defense PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495525/normal_604d349e039d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_5fd0d5ed5308d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485450/normal_60696ee780b31.pdfIn PDF document text
    • https://fenatinuzari.weebly.com/uploads/1/3/5/3/135314561/genorur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_6046bf3b8921a.pdfIn PDF document text
    • https://nowabarabowuxo.weebly.com/uploads/1/3/4/3/134319250/jefew_sodewakeguwibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_6063892b789b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483331/normal_606505d3ee9d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452846/normal_6065fabecba26.pdfIn PDF document text
    • https://zigetavut.weebly.com/uploads/1/3/0/8/130814179/1f8ff95470ba.pdfIn PDF document text
    • https://lugijuvumefabi.weebly.com/uploads/1/3/4/7/134761930/c8aa3108b130f8.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/neporezofov/pubitugabudadizinasozof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8533278c-9b05-4e81-b5df-e9121669a2b6/metal_gear_solid_2_substance_walkthrough_part_1.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/sony_bdp-s5100_region_free_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c40de8f-de4b-4c1a-b859-915b5e589f8b/cyberpunk_2077_ps4_pro_performance_issues.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/ford_6.0_diesel_oil_spec.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/slack_android_font_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3062b57a-b645-48a4-a6a2-f2ac9c597b7f/line_6_spider_iv_30_presets_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706762c0-7209-4ecf-9d92-08bd7b11a57a/fatigue_icd_9_cm_code_for_depression.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11065 5088 bytes
SHA-256: 7706cdea3e6b373ed9734596776629fd2bc1fb804be6898722f39f4708225a9e
font_01_sfnt_off000121c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C4 11328 bytes
SHA-256: d90161396d5f11b5fe4f19c8f7c785f93e61b080eccadcf249354a5fee300837
font_02_sfnt_off0001487f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1487F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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