Malicious PDF — malware analysis report

Static analysis result for SHA-256 a120d9754ba4e3e1…

MALICIOUS

PDF

79.1 KB Created: 2021-03-18 07:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b778a00216beb3d599ebe03e824fa982 SHA-1: 572317b0b821a6f91551cca0a3abe860e3bbb70e SHA-256: a120d9754ba4e3e18ca7dbd5c5de8628942d32024cea856b56f97abea073738f
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 0.9997

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://jottigo.ru/strik?utm_term=how+to+determine+the+angle+of+molecular+geometry PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368782/normal_5fc7f8f0853a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_6042d0ad6cadf.pdfIn PDF document text
    • http://zatutajijiti.getenjoyment.net/bharat_ni_bhugol_map.pdfIn PDF document text
    • https://lusanazuwade.weebly.com/uploads/1/3/4/0/134000197/seludilawa.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/vuwedekekave.pdfIn PDF document text
    • https://gejamuxubidiz.weebly.com/uploads/1/3/4/6/134688077/denejurix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476930/normal_6009eff5c7fa5.pdfIn PDF document text
    • http://rewetuxavix.mypressonline.com/21287146178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_600e75be751dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ximolamerojizud.epizy.com/57849220980.pdfIn PDF document text
    • http://gugefojekasarul.epizy.com/garage_ceiling_sheetrock_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45dc706-8629-42ee-bdf3-e0eae8296a2a/89970224320.pdfIn PDF document text
    • http://rizusuzapil.rf.gd/adobe_acrobat_pro_free.pdfIn PDF document text
    • http://jagivaxo.rf.gd/luxomepiwew.pdfIn PDF document text
    • http://jumuvurerurulap.rf.gd/how_to_test_honeywell_electronic_air_cleaner.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/5667889539.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/whatsapp_comedy_video_status.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf24f9df-d8b2-4f7d-9757-1cfb29e54149/la_casa_de_los_espiritus_pelicula_elenco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86e2427-5592-4719-9c8b-07da59810bc5/85963514667.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/mobile_legends_layla_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4338992-8a4a-43e9-88a3-fc7746b7ae94/48842954226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13eb10c1-c9b7-4f0f-92f5-3c034b4c7105/how_to_heal_your_emotional_pain.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_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 5412 bytes
SHA-256: 1937021540ef68ad583592bab1615ecc676649e66d4b1327a0c518691a290828
font_01_sfnt_off00010714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10714 11588 bytes
SHA-256: 0be37a3265b4f1008dd42fc38317e7950fece16ec74e76cadec1a8732add9739

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