Malicious PDF — malware analysis report

Static analysis result for SHA-256 426d24fec6bf5010…

MALICIOUS

PDF

208.3 KB Created: 2021-06-11 11:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 40a2db9239ad8cb99acbc1c59f16b318 SHA-1: aa2ca28a0798b1cd565ea7e49f35ae9a132f2611 SHA-256: 426d24fec6bf50106ddaa8aa46c89aaa9b2bc9327748b1ac85a8064dfa323ff0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Alice in Wonderland' to entice users to click the malicious link. The primary attack vector is likely spearphishing attachment, leading to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://philabc.ru/pbw?utm_term=alice+in+wonderland+full+text+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471235/normal_5fc79b23986a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_60b7e2772d9fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_601e182d37e4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_603b667b1a547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_604847cde23c3.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/3d85495d-a553-4289-a75c-83da32558aad/66783288745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a34e56f-1aaa-462f-9bd1-8990e8f6fa6c/xalubipopivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b390292e-e988-4930-a6c3-ea15577338fa/supernatural_book_of_the_damned_transcript.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/skyrim_can_you_become_vampire_lord_again.pdfIn PDF document text
    • http://lokuwulixit.pbworks.com/f/auditoria_administrativa_segun_victor_rubio_ragazzoni.pdfIn PDF document text
    • http://zumejukikug.pbworks.com/w/file/fetch/144786045/pafawadoxuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b9d366-ae5e-4a99-8a8e-bf3cd941e89c/what_is_franz_kafka_best_known_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef297437-3ac1-42d3-a548-2c7083fe46ce/how_to_get_the_birthday_countdown_filter_on_snapchat.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/w/file/fetch/144600741/how_to_hack_hill_climb_racing_pc_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55760571-3e32-4b97-be76-e27c227a0c66/xusejulibawatex.pdfIn PDF document text
    • http://mizelabe.pbworks.com/w/file/fetch/144535245/lisotokadewuturefabodaxiv.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/prentice_hall_united_states_history_reading_and_notetaking_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502f1f00-e124-4f5b-8b1a-1b06dcb47b64/alimentos_y_bebidas_que_los_contienen_verduras.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/xigoxikikajotaviter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a57df3-e8a8-4737-86df-c6771e9270fe/99507668862.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_off0002f930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F930 5120 bytes
SHA-256: 91d43bd23eea74945b748eae2d572ac5e2aa480a0f069ce49e51965976a11b0a
font_01_sfnt_off00030ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AC3 11800 bytes
SHA-256: 8b4b781c2ff5dcbce85b8e9aa922e20432c3fbf8010da6589a6bc186e9475811

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