Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d027be1df0d6d2…

MALICIOUS

PDF

77.1 KB Created: 2021-03-21 09:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8350e432990df95ef072a14f847703a3 SHA-1: dc246d708e7ae59f87fb9b78a7de7a657258d98a SHA-256: e5d027be1df0d6d2cd80dcbaeb59eff52d4a5e18ab6b9a88f421e4be0d582d04
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as malicious and a ML classifier with high confidence. It contains an embedded URI pointing to 'https://dafemum.ru/wix?keyword=revature+interview+study+guide', which is likely the primary distribution point for a phishing or malware payload. The document body, though heavily obfuscated, suggests a lure related to a 'Revature interview study guide'. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious intent.

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://dafemum.ru/wix?keyword=revature+interview+study+guide
    • https://static.s123-cdn-static.com/uploads/4375339/normal_600507e33497e.pdf
    • https://static.s123-cdn-static.com/uploads/4391047/normal_5fc902046df77.pdf
    • http://coupons2020.info/kekimoxubepiwovoph6v4n.pdf
    • http://mirror-x.org/dewivopj4zbf.pdf
    • http://kaxazul.iblogger.org/sporcle_harry_potter_quiz_answers.pdf
    • https://cdn.sqhk.co/mepofazobi/YmXQfnx/vipevamopagepejomukuk.pdf
    • https://static.s123-cdn-static.com/uploads/4484115/normal_5ff9698fcb65d.pdf
    • http://nisiwitas.22web.org/android_assets_file_not_found.pdf
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5fc6b11de2378.pdf
    • https://cdn.sqhk.co/bavimimo/hgjajba/bleeding_love_violin_sheet_music.pdf
    • https://cdn.sqhk.co/bisidilit/hdPgfjg/58694171879.pdf
    • http://verifedform.com/vazoxafegejutapijirageerr05.pdf
    • https://static.s123-cdn-static.com/uploads/4411686/normal_5fcd41c3cfb16.pdf
    • http://giftcard-sale.store/how_to_replace_chain_on_homelite_electric_chainsawecrtg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1285799c-9072-4e6d-8f73-d0cd2c46e259/chemistry_a_volatile_history_worksheet_answers.pdf
    • http://pododopinaziso.rf.gd/39612589572.pdf
    • https://uploads.strikinglycdn.com/files/20f4a728-192e-4089-bb43-38e43db9156b/weight_loss_tracker_chart_app.pdf
    • http://varaxekewuveza.epizy.com/example_of_biographical_data_in_paragraph_form.pdf
    • https://uploads.strikinglycdn.com/files/b8dfa2ae-345d-4542-8136-d187bd6fe514/what_does_the_judgement_card_mean_in_a_love_reading.pdf
    • http://kikexufan.epizy.com/us_history_review_book_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b3.bin
ca4d943391670ca2f02e86eef70eacffbbba7f6b6f231361bdd266b94fe438de
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 5224 bytes
font_01_sfnt_off000102a7.bin
9690be51bf7d9b39916acc8411e78f759daf26d18e94c65de3c6a49e0e02a88a
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 10712 bytes