Malicious PDF — malware analysis report

Static analysis result for SHA-256 d656835bfb9d7d1a…

MALICIOUS

PDF

74.8 KB Created: 2021-03-08 17:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: eb54a299f032ab9ee3b2921934e20530 SHA-1: d179ef52c01e5f5cec290cbc9469eaa4254495be SHA-256: d656835bfb9d7d1aa4346720719ddff77a16f3fa39503caad56f1fb2d54f747b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is `https://resalured.ru/strik?utm_term=samsung+un28h4500afxza+manual`, which is likely used to redirect users to a phishing or malware site. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=samsung+un28h4500afxza+manual PDF link annotation
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/1659085.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/03e626c2027065b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_602416aa348f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5fc745dc4caea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464702/normal_600574dd0f18f.pdfIn PDF document text
    • http://lerevujoda.iblogger.org/orasatha_album_song_audio_masstamilan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419851/normal_5fcc920a60486.pdfIn PDF document text
    • https://wuwosafojopog.weebly.com/uploads/1/3/1/4/131407683/a6cae51c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_602d2ecb1b32e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/sarkar_hd_movie_tamilgun.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_b7cc3a57761c48af9389525415a92573.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/hotpoint_ariston_manual_english.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/acute_prostatitis_treatment_guidelines_2012.pdfIn PDF document text
    • http://kafojifonetawaj.rf.gd/kemapulokusekudogup.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_e8cffd6b74d1492d86c02cc9fd028d66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/county_government_act_kenya_law_reports.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_e9b09f8ecaf5460b9108cffc1ac81d92.pdf?index=trueIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_e6d7e8e4bbc84a2ca1132567def72afa.pdf?index=trueIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_992d3242be7b44209b0eaca947757299.pdf?index=trueIn PDF document text
    • http://fulariponazaget.epizy.com/will_3_phase_work_on_single_phase.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/14443713545.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/matidosufifo.pdfIn PDF document text
    • http://silapopo.epizy.com/aviagen_hatchery_management_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C4 5988 bytes
SHA-256: 11fbae111c499b29d3f75dba4db99e22dcb9361ca6cf561cd453b49d95d453ad
font_01_sfnt_off0000f71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71A 11636 bytes
SHA-256: 8f060635ee33b6d086454710be3ee49c21d74aa3997c05630e9ba2c322888f58

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