Malicious PDF — malware analysis report

Static analysis result for SHA-256 605467672deb713b…

MALICIOUS

PDF

90.5 KB Created: 2021-05-28 07:35:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a44126ac44dce569f6d250f9d7498e83 SHA-1: 90f0a5bf06adc47a5bd00cae056d6256adcb24ca SHA-256: 605467672deb713b8e76e9f551fe6b0e9d8aaa1d56811946edbcaaff1978ee1e
156 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 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 0.9998

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://leonvi.ru/strik?utm_term=how+to+use+pantone+color+guide PDF link annotation
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/javoweresefawifav.pdfIn PDF document text
    • https://tajulariti.weebly.com/uploads/1/3/4/8/134863193/revat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_605f30e41581c.pdfIn PDF document text
    • https://warenumew.weebly.com/uploads/1/3/4/8/134871813/zilatobesasam.pdfIn PDF document text
    • https://ritajixudigozik.weebly.com/uploads/1/3/5/3/135345652/zatuxefowo-tawafaxef-suvajawamobe-ximuna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495254/normal_5feb4c0aa2dc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485693/normal_604860fac8909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4e2bd942-d27a-4e31-8c88-11c039c711b0/16106837564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c282acec-9b5a-40d1-898a-193541f6e5d6/wufudunakodab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9630837d-db22-4c28-83e0-75c2b1ec4200/17_cuentos_de_juan_rulfo_el_llano_en_llamas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd7aff01-cac5-42c5-a0cc-188b2755bac9/66119453739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cecf30f-ea82-415b-8545-a5b176168b09/what_age_baby_bjorn_carrier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82708104-5407-4221-9552-850607ecd737/can_the_other_person_see_deleted_whatsapp_messages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3745caa-ce42-40af-8cac-1aed34692646/how_old_is_lyra_belacqua.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2341db6-cff6-409a-ae4b-5fbb1d31538a/acceptable_forms_of_id_to_purchase_alcohol_in_alabama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571ed153-e664-485b-8b73-211beecd590a/reganaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d5e772-574f-4c17-a86d-1d9f36b8e719/xirot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c66852-b4df-4f70-b02c-fa8bbc5c1e6c/what_is_the_best_dvd_recorder.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E0 5176 bytes
SHA-256: 22bfb39fe77cca16896fe8f8474009df699c6d8a5c4e7cb01d4bda97be88931d
font_01_sfnt_off00012590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12590 11436 bytes
SHA-256: adac0c2a8826bcb5f4debbf7857cc500dd244eb4ebb19d53738dfe2ef1ced5d7
font_02_sfnt_off00014c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C67 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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