Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a38f61a5879ffbd…

MALICIOUS

PDF

73.5 KB Created: 2021-01-21 02:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a9fee403105f97653984199dd6e6eb45 SHA-1: 194bd5f40ad76e141e5091985d91b91d8675ee01 SHA-256: 6a38f61a5879ffbdf648fd98aa051e0b6bd99ea306e8550df209a9fe7678c825
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 detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Apple manual macbook air', suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the presence of external URIs and the overall detection suggest it acts as a downloader or redirector.

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://seumenha.ru/123?utm_term=apple+manual+macbook+air PDF link annotation
    • https://cdn.sqhk.co/tuwebobit/UrKncge/saxufadokirenize.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/ieOYTsx/cake_decorating_tools_in_qatar.pdfIn PDF document text
    • https://cdn.sqhk.co/wejewenu/ffosjh0/kegewojabakowifuxusi.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/4jdYOYS/empire_tv_tycoon_free_download_android.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/2hdmhba/boseguvutem.pdfIn PDF document text
    • https://site-1177969.mozfiles.com/files/1177969/newspaper_layout_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5fb74c952b8a3.pdfIn PDF document text
    • https://site-1172047.mozfiles.com/files/1172047/perkembangan_agama_kristian_di_malaysia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372073/normal_5fded7120d162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5fad6fd9ca783.pdfIn PDF document text
    • https://cdn.sqhk.co/somupojebif/e9ghDgh/xetefolozelerusadazofaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fd3cce59530e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5faef7ecbef99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 5096 bytes
SHA-256: 49d853be17770efc643f61064df9eb632b401b5716ad5d204d8a6171262e3b07
font_01_sfnt_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 11272 bytes
SHA-256: 162db733acf000d27ddb9eb255340568d6d2d4ea450707799415c95b341a4278

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