Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd55126d7efcadd7…

MALICIOUS

PDF

75.7 KB Created: 2020-12-18 13:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 461fd841d8b97898eb377b2997c703b0 SHA-1: 319a50c496fd16c95cce0493becd4f9f1d35ec1c SHA-256: bd55126d7efcadd7c95f95e76f69bf377496bc7f67a54fe6f7a404c4d72315d5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains text suggesting a lure for 'Angry birds full movie in tamilyogi'. An external URI, 'https://traffset.ru/aws?utm_term=angry+birds+full+movie++in+tamilyogi', was extracted, which is likely the malicious destination. The use of a PDF document with embedded links points towards a phishing or malware distribution attempt, commonly delivered via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=angry+birds+full+movie++in+tamilyogi PDF link annotation
    • 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/ee0013bd-765a-46b3-be9a-98ef95b7693c/grace_paley_mother_interpretation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e7bc7c-74c2-4c7d-a61c-f8f6ecaca6d0/moziluworatanuzokedebulap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912cac9b-6061-462b-a422-e11b4c1bf690/ong_definicion_diccionario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9ed516-0daf-43d2-8cdb-cc8f1c3ffef7/davezakolifubotut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579aa366-575e-414a-8bf5-8b7cfb1e6a57/4773081285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e681705-05ae-4035-8c22-df8d071c85b4/que_es_una_composicin_escrita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b25717-e249-414f-9234-19442f10dbf6/treaty_of_versailles_crossword_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50580b33-ede4-42de-9ea0-5731b4b35ba6/84026859595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3413e77a-5874-4287-ad14-3ed72eb8494f/xupokoketupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d48323-ff20-47d8-a828-f73c0fb0649d/47280907737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3e4eaf-4344-417a-9e34-905e0dd4286e/fekifalizaguz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34622aab-4792-4839-ae3c-e90463196add/effective_python_2nd_edition.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_off0000dd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5A 5400 bytes
SHA-256: bf57cb388b33e01aa3a572a9046e4ca358c7a77dc7c20adf6d0ed4ff083fbd2a
font_01_sfnt_off0000ef9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9F 10580 bytes
SHA-256: 66447cea5f1f4a2bb543c4f6783febdf10d41290c02ac4e242a676b3ba5f76de
font_02_sfnt_off000113b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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