Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b42143e112141d…

MALICIOUS

PDF

94.5 KB Created: 2020-12-20 01:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f9eeb427cbe2614c320127323aed69fb SHA-1: 432e55bfeabecb498c5aca38060423f63bd4fbc7 SHA-256: a0b42143e112141d17ecd3cd67a0791a569a3eef243e31b1695fd380554c995a
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://trafftec.ru/strik?utm_term=byron+nelson+high+school+athletics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505839/normal_5faf0bd92b086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f8987ee071da.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://static1.squarespace.com/static/5fc6c6c3d8e4f44799627e9a/t/5fceb58d39a3713f5fe84d8e/1607382414499/76509744689.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/allahabad_kondapuram_songs_naa_songs_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e92a0a2757459be2ed0b/t/5fc3e468fa04221c7197df66/1606673513125/call_me_by_your_name_book_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/73249674309.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/buwuvil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562987b7-eeb9-4e27-9bd1-ff37218b4150/medical_billing_and_coding_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/niv_bible_free_download_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc116c5bdb33045eec368a4/t/5fcbe68966ddd570b00351a1/1607198345682/feasibility_study_appendices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76aa248-4d8b-4d5d-ab98-58dc1b64cc05/hush_hush_becca_fitzpatrick.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/agribusiness_management_downey.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55e3d239b0722914f125b/t/5fcc4dea7ae85b53b286b2a6/1607224811020/90481489123.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_off0001287b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287B 5000 bytes
SHA-256: 5e27153b4fb130af93c26400aa797491f3372815955373d66c0d635dcae873c8
font_01_sfnt_off00013972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13972 10932 bytes
SHA-256: 9893636a0b7bbfcd11266cc60c82248d02c4acd7279bb965a6fc0a5af29714fa
font_02_sfnt_off00015ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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