Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ab7c2dfefe2f46…

MALICIOUS

PDF

66.8 KB Created: 2020-11-20 20:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5507ac3d4916eec644faf02b30422aa3 SHA-1: bbc1cc6dc8bf67786e798e924de1586bcd7d421e SHA-256: 38ab7c2dfefe2f463802497bb30b40dc5bd2a742796fa5147202cf6861ada428
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 by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URL suggests a phishing or malicious download lure, likely intended to trick the user into downloading a secondary payload. No scripts were extracted, but the overall structure and detection indicate a phishing attempt.

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://traffnew.ru/123?utm_term=the+book+of+secrets+osho+pdf+drive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385028/normal_5f911ebcee27e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501659/normal_5fb44b9820c1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f89e226d47ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5f8e1c4ad33ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5fb497a045c58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483854/normal_5fb4f75983e29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502178/normal_5fae15bf99b57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b72ab90-ad93-46c9-a85d-480c9c631c55/lapovepobiseva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7207a066-b0ec-44d0-b020-f7774138509f/mosley_high_school_graduation_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01b9d63-46d6-4d7c-aced-861e956c16df/penirovakesetulozutiwisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d31992-322e-49f6-a87a-51eb505361d0/filemuwogaxugodogerop.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/apartment_lease_contract.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4a6943-95e5-4f72-bb55-2153f088ed40/xapikegegijekudorabizuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5737da24-40c8-4a90-a1a5-c4ea613a591b/tewetabelolixul.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_off0000c8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AF 5216 bytes
SHA-256: 585aabce53ed3321ebd792e7fdac46126fc80eba3a472c09e0a34f7a71fc010b
font_01_sfnt_off0000da6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 10568 bytes
SHA-256: d6f75ad1cac73f90f24e2e581954a00778965b13a5d3a6783029ae41bf60d8fc

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