Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b954d3b36b9b67e…

MALICIOUS

PDF

107.2 KB Created: 2021-03-25 05:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0be445a75da7120a2a43ef255adb2b63 SHA-1: 6184b4d23bb8677849a92bb5dca1ec03b0ce7dac SHA-256: 3b954d3b36b9b67ea414862933f8ba18e899ec2e61dff2cc967159f4b6ff79de
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a ML classifier flagged it as malicious. ClamAV also detected it as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to contain text related to a map, suggesting a lure to disguise the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=luxor+map+las+vegas+strip
    • https://cdn-cms.f-static.net/uploads/4490122/normal_6028f5d81b8b4.pdf
    • http://dreamingdeveloper.com/32376239317eurfr.pdf
    • http://tiriruno.sportsontheweb.net/how_to_write_a_song_on_piano.pdf
    • https://cdn-cms.f-static.net/uploads/4420747/normal_604d3222b2de5.pdf
    • http://hookup673.site/siwagavaniwabutetidaxs94p1.pdf
    • http://luwinilulurop.mywebcommunity.org/organizing_quadrilaterals_worksheet_answers_mathbits.pdf
    • http://golden-bridge.pro/is_there_a_working_ps_vita_emulatorfce9f.pdf
    • https://static.s123-cdn-static.com/uploads/4489834/normal_5fef3d7d48df9.pdf
    • http://nomokesus.sportsontheweb.net/peerless_transaxle_model_number_206-545c.pdf
    • http://worabipupe.mypressonline.com/url_to_converter_online_free.pdf
    • http://vzroslyh.net/best_crypto_exchange_reddit_2020fxbml.pdf
    • https://cdn-cms.f-static.net/uploads/4444123/normal_605a5d9b9c9d2.pdf
    • http://ig-about.net/hamlet_act_4_scene_1_and_2_summarywtf4c.pdf
    • http://thecabinets.xyz/73921986825vd0pr.pdf
    • http://lnstagramverifiedsbadgeform.com/4489597808rcfva.pdf
    • http://yachts-4-sale.com/finaluxidewz6w6j.pdf
    • https://cdn-cms.f-static.net/uploads/4495707/normal_60510c9bb093b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7d653630-02d9-4298-ba18-83fc57ac1cf4/wikokibidafuvavibokojedek.pdf
    • http://telusomabufa.onlinewebshop.net/a_level_mathematics_question_papers.pdf
    • https://uploads.strikinglycdn.com/files/7631516b-08c4-42ed-b321-505900d54e80/how_do_you_reset_a_magnavox_tv.pdf
    • https://uploads.strikinglycdn.com/files/2e03ed3e-1a53-4cec-bcfe-f4cc4e8028d3/my_favorite_things_song_youtube.pdf
    • https://uploads.strikinglycdn.com/files/c73f8b72-03e9-492d-b308-2ea3700e4095/dufonedelu.pdf
    • https://uploads.strikinglycdn.com/files/8c14ac6c-5ab4-45a3-a0f4-be7b90b1384e/57305426780.pdf
    • https://uploads.strikinglycdn.com/files/01491c76-210a-4a52-ab08-e2051f0179c3/25309573784.pdf
    • https://uploads.strikinglycdn.com/files/98ae9d44-d515-4db7-8342-b0b6611f072c/duromax_propane_generator_wont_start.pdf
    • https://uploads.strikinglycdn.com/files/bf04a6f2-d18b-4c64-95b3-9bf9157ff17e/88194543750.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_off0001678e.bin
03abff2f717fd711ca747f6bdce289a066a688e6223c2be2f957215af35379e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1678E 5208 bytes
font_01_sfnt_off00017937.bin
bdf337b4f9932b95676f44962f6c32893e63c31328100544932d063afb93b5ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17937 11316 bytes

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