Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58bfe3a26c80fb0…

MALICIOUS

PDF

77.9 KB Created: 2021-04-14 02:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eecb576d89c0b7ddd8bac7b0e7564d30 SHA-1: dd79be001971d0a1bdba2b37857e1268cee26598 SHA-256: b58bfe3a26c80fb0bd422751622f25520bafbed84de43e070f3eec9c11ec9ccb
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 0.9996

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://golowaki.ru/strik?utm_term=bibl+104+new+testament+gospels+bible+study+assignment+correlation PDF link annotation
    • https://mufajagirudul.weebly.com/uploads/1/3/1/4/131452858/dd0949.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406169/normal_5ff1ce1508b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421612/normal_6060fa206ad8e.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/sivilevinakuron.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/litaba.pdfIn PDF document text
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/6928816.pdfIn PDF document text
    • https://zuwadakake.weebly.com/uploads/1/3/4/6/134664894/gakisamo_fotebevuzuw_nutafazoteduxa_fipuwevarip.pdfIn PDF document text
    • http://azakalaza3.xyz/the_bell_jar_summary_videoofjv8.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/cIgfifU/uber_eats_group_order_app.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/vekitajeliz.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/15725215849xzxsk.pdfIn PDF document text
    • http://boldly-grow.com/diwixodokewivisemaxepm26bq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473340/normal_60350338a85c9.pdfIn PDF document text
    • https://rodokonodak.weebly.com/uploads/1/3/4/7/134730192/8ce880b2861b3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421477/normal_5fef34df1235c.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/WTkXjRF/79647293745.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/437b6f0880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460723/normal_603d0f12e7ec6.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/bmrzSBz/xopasexinusoboza.pdfIn PDF document text
    • http://itali-big.space/wakulipab0rxv.pdfIn PDF document text
    • http://legionmone.xyz/feminapasosinelujekojcnmyr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF003 6056 bytes
SHA-256: 01adf4a06892bf5dfe97c1db3cc83a5f4bc68357b71b296a7713cadfc002628b
font_01_sfnt_off000104aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 10876 bytes
SHA-256: 40d963ead3ecc6d7c6665fa99e90a789b5a7219490b075d13606f74288f7cf26

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