Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b413fa57025e4f5…

MALICIOUS

PDF

80.6 KB Created: 2021-04-03 09:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 210cd4e412f8660b63f2b7006951767b SHA-1: 12286a458b33313bbaf854d3ee4eb0fde1d19eb6 SHA-256: 4b413fa57025e4f54424dd16a709652a64d9b49b2050bc161130fa91facd392d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/strik?utm_term=how+to+play+football+for+beginners+wikihow PDF link annotation
    • https://cdn.sqhk.co/nepofigiper/QhbihSF/pl_golden_boot_race_19_20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494883/normal_60590ded9c053.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/iYopihB/3235195277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_6064a09c39342.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/LgiegeE/rejaruxuxurevopirukawe.pdfIn PDF document text
    • https://cdn.sqhk.co/pubabolab/hhhiZgf/18495308430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_6050fd87d5181.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478716/normal_5fec3469eb68b.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/khfVodX/napolabaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412889/normal_5ff5be64a02b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_605327e935c95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484143/normal_606750dba093f.pdfIn PDF document text
    • https://cdn.sqhk.co/rutuliduzo/Zha4fhb/blood_pressure_readings_explained_nhs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410962/normal_60207b700aa5a.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/potofaw/sekefosoruzeropagakax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d46610-bf96-4cfd-92f9-1fa77bdd846b/directv_genie_not_connecting_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4070521d-29b6-4632-99c3-06e5b0725bf3/game_of_thrones_books_to_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/18750905197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31fe676c-aa6a-4b0c-9b22-f9847ebad9fe/72480119477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b83d5ae0-4578-4480-9472-617b491408d6/taco_bell_shredded_chicken_burrito_fresco_calories.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_off0000f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 5524 bytes
SHA-256: c48c8b48ebd71e97d1cfae467be50829e184925238079b4ad4fad8924e7aafa0
font_01_sfnt_off000105f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F6 15636 bytes
SHA-256: 408e23cfacc09ecf42fac88eea962bef4618235d7fa56c14087cd8d4a5b29a35

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