Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa55d5346cf24661…

MALICIOUS

PDF

102.7 KB Created: 2021-04-05 09:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8981a3b06d9f32d3e3ff71619e39f12c SHA-1: 3e98df2b3d26e6323ad24c4b476ac839ede7ba3f SHA-256: fa55d5346cf24661b072eef2ea9b8ba06af8a7a0e99f2986f5baa6ad60b1d082
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=609+meaning+bible PDF link annotation
    • http://panijawukufo.iblogger.org/revista_atualidades_enem_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499958/normal_5ffd79f517562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_603879a028298.pdfIn PDF document text
    • http://devgm.design/gomorapazeflvh39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_6005e9df5b9b0.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/nubode.pdfIn PDF document text
    • http://gerajite.iblogger.org/cambridge_primary_ict_curriculum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_601c94a0c35aa.pdfIn PDF document text
    • http://skidki-day.site/revelations_of_divine_love_best_translationqx59s.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/16405196129.pdfIn PDF document text
    • http://liseveziko.iblogger.org/market_risk_management_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_6068c690081cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wifanomozumof.rf.gd/base_de_datos_objeto_relacional.pdfIn PDF document text
    • http://gagutaxu.rf.gd/pawuzaja.pdfIn PDF document text
    • http://fevepapowiwed.epizy.com/powerpoint_storyboard_template_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773d6add-9840-49c9-a650-1400f5dff384/47850356525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35ecac2-aeb9-4ada-a3ed-0d64dd6f38eb/trig_functions_worksheet_answer_key.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/master_cleanse_results_30_days.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/babd3667-b98e-42fd-b43f-5465dc096eb1/72560313008.pdfIn PDF document text
    • http://jatuvudusu.epizy.com/43225368188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d789c1b1-c6ba-41fe-9229-0d6bd333f976/pafoferit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f92ead73-2253-4076-a1ab-c5638afb9231/zesobite.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B4 5228 bytes
SHA-256: 388a082cf6e9571dff3933ab2fa88c7f042180aed04239e6eb0a9d5c8868b207
font_01_sfnt_off00014667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14667 15240 bytes
SHA-256: f3fe81ad15ab6a032e5954aba305fb09ef5ab46afc9d30d39a97fe47ae977ef8
font_02_sfnt_off000176a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176A4 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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