Malicious PDF — malware analysis report

Static analysis result for SHA-256 63879a901588367b…

MALICIOUS

PDF

86.1 KB Created: 2021-03-11 12:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e4da6079a01fec8347a29c39c8f07f4 SHA-1: 9a57944f3d159c262072b793477576e7a4c57a26 SHA-256: 63879a901588367b5fce2b6cefd436709da144b9ab4d51dfb1f667dc210da345
136 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. The document's content, though heavily obfuscated, combined with the presence of external URLs, suggests an attempt to trick the user into visiting a malicious site, likely to download further malware or engage in phishing. No scripts were extracted, but the PDF structure and heuristics point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://soxebez.ru/award?keyword=basic+probability+questions+with+solutions+pdf
    • http://kokofiru.22web.org/assassin_s_creed_brotherhood_apk_obb.pdf
    • http://fruct.space/phonetics_and_phonology_peter_roach07i2c.pdf
    • https://kujufilobi.weebly.com/uploads/1/3/1/4/131482850/rewebu.pdf
    • https://nimukitu.weebly.com/uploads/1/3/4/2/134266418/3366327.pdf
    • http://topsale.pro/robin_hood_disney_movie_soundtrackz8c2r.pdf
    • http://bnatural.space/messenger_lite_new_versionh7ylo.pdf
    • https://cdn-cms.f-static.net/uploads/4465688/normal_6041d80de6222.pdf
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/224234.pdf
    • https://static.s123-cdn-static.com/uploads/4476126/normal_60063260bc5da.pdf
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/ced0ebf3cdd6.pdf
    • https://static.s123-cdn-static.com/uploads/4371265/normal_5fca8485b8067.pdf
    • https://static.s123-cdn-static.com/uploads/4455195/normal_5ff4a04613dce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7d600bde-c88e-49a4-9b28-dc30cd082bf5/xonetulabo.pdf
    • https://uploads.strikinglycdn.com/files/d5d29326-326c-4a5d-b0a8-1ae87db5b3b0/gawizetalefigobibixajuwez.pdf
    • https://uploads.strikinglycdn.com/files/ac25f90f-04ad-4585-bbd4-2d6f49a73792/bluetooth_keyboard_ipad_pro_12.9_3rd_generation.pdf
    • https://uploads.strikinglycdn.com/files/22bd22a9-9703-49ab-b408-6c83f8a3e803/52562361723.pdf
    • https://uploads.strikinglycdn.com/files/18b6ee32-e050-45fc-ac62-56cc7b55349b/why_does_my_side_by_side_refrigerator_is_not_cooling_properly.pdf
    • https://uploads.strikinglycdn.com/files/d06d3e15-6377-4187-9fcc-a2a7d80d5461/ways_of_reading_an_anthology_for_writers_11th_edition.pdf
    • http://saduxax.epizy.com/chhath_puja_song_mp4.pdf
    • https://uploads.strikinglycdn.com/files/1ff23011-903b-4681-9727-cb191d96c2a7/rujedumubizidiwifumofepuk.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f386.bin
64083535a3b243b4e12b900e83f56b35230a3b6b479356fec6fb3d57b3587a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 5752 bytes
font_01_sfnt_off00010728.bin
34ad777eaa0dc70f4171d1f4d37934c8f31fd373e83f86cded6ae2ed66092b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 13732 bytes
font_02_sfnt_off00013385.bin
292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13385 16096 bytes

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