Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56ea807f92dc0a4…

MALICIOUS

PDF

72.0 KB Created: 2021-02-11 22:25:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f94b9b19731be60c80a685ee1fbe6c4f SHA-1: 795053e9043cc7b6e67855b06a17a9980fa6abb4 SHA-256: e56ea807f92dc0a4bc689005b3a9b5229a9a30a0fde8d8c49eac1f80aab3a503
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm. This heuristic, combined with the ML classifier and ClamAV detection, strongly suggests malicious intent, likely for SEO manipulation or to distribute further malware. While no scripts were extracted, the presence of embedded URLs and the nature of the link farm indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://druttle.ru/wix?keyword=pan+pride+shirt PDF link annotation
    • https://cdn.sqhk.co/rokajoten/je2mHje/follow_hashtags_on_instagram_2020.pdfIn PDF document text
    • http://fezomoworiva.22web.org/wokeriwewelimemimafumel.pdfIn PDF document text
    • https://pofimutazotoxo.weebly.com/uploads/1/3/4/0/134000188/3347845.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/9lgiMOb/cyber_clock_timer_free_download.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/mewakumapebadomumeg.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/ifibZge/95820552907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fd680bfecf65.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/76a419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418199/normal_5fde1ebd13143.pdfIn PDF document text
    • http://nipokafusili.iblogger.org/anova_reporting_f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451950/normal_5ff1f95892d21.pdfIn PDF document text
    • https://cdn.sqhk.co/bukoxomule/gj3gfoh/live_weather_radar_free_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/loranoduzuja/small_arms_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/tomtom_central_europe_map_free.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/bandos_solo_guide.pdfIn PDF document text
    • http://vavipok.epizy.com/zetoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/79636263401.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/ubuntu_16._04_3_desktop_amd64_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/management_of_hypertension_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/tezobop.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/24331566201.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD13 4692 bytes
SHA-256: 20e7e273376c19c1103a3aff32d444c829878468357706ba8d539f0a4d0f57df
font_01_sfnt_off0000ccdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDB 7084 bytes
SHA-256: 9eebe359ab46640d2ab5ff252d936a2a2f8ff4127d8d6275a892e3d0d7399c92
font_02_sfnt_off0000e00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 10360 bytes
SHA-256: 2453aafb4e1e02c1c91d8a620cd5bc2083b764d8d359ce4b230f1a2e668d84cf
font_03_sfnt_off00010321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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