Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab4d325cc3db983…

MALICIOUS

PDF

74.9 KB Created: 2021-06-07 04:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcdaa7da6dd8ecd03e1fdcd79a0d122a SHA-1: c550890ade74ba751cf0c2c9d9d2931a1ddf612c SHA-256: fab4d325cc3db983e1ba2f929f8ba563a2af1ccbe4f38c50896fe54fc1c759da
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. The presence of a 'download button' heuristic and an external URI pointing to 'oniceh.ru' suggests a phishing attempt designed to trick the user into downloading a secondary payload. The document body contains garbled text, indicating potential obfuscation or corruption.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/pbw?utm_term=shimeji+download+deviantart
    • https://cdn-cms.f-static.net/uploads/4379605/normal_6059ce886739a.pdf
    • https://cdn-cms.f-static.net/uploads/4415519/normal_6061cbb10846e.pdf
    • https://cdn-cms.f-static.net/uploads/4470967/normal_602f8082babff.pdf
    • https://cdn-cms.f-static.net/uploads/4474999/normal_5fd0a04a67231.pdf
    • https://cdn-cms.f-static.net/uploads/4367903/normal_6023ff9882964.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://divogatupum.pbworks.com/f/games_to_play_when_bored_with_friends_over_text.pdf
    • http://sorawako.pbworks.com/w/file/fetch/144613236/react_redux_to_do_list_example.pdf
    • https://uploads.strikinglycdn.com/files/9e29208c-da1c-4b96-8569-753cfcaf22c0/29175018687.pdf
    • http://fulusivijomu.pbworks.com/f/white_rodgers_1f78-144_thermostat_manual.pdf
    • https://uploads.strikinglycdn.com/files/70934435-c98b-4d23-a3ef-80d6455dd6c3/what_does_242_mean_in_angel_numbers.pdf
    • http://nitezug.pbworks.com/w/file/fetch/144567216/o_que_comer_no_jejum_intermitente_low_carb.pdf
    • https://uploads.strikinglycdn.com/files/75007a7b-a87c-4f18-99ba-ecdf9f6575b3/easy_piano_songs_chords_for_beginners.pdf
    • http://fepazonavu.pbworks.com/f/jolixijife.pdf
    • https://uploads.strikinglycdn.com/files/0d342b15-77b3-44f9-a382-c289e6b19513/5th_grade_multiplying_decimals_worksheet_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/450c5e46-9565-4d3c-9cf6-1939fc56377f/rupokotevolurenamat.pdf
    • https://uploads.strikinglycdn.com/files/b723ac16-71bf-4291-871f-85c7a8c3462c/washington_post_covid_19_update.pdf
    • http://fixiguru.pbworks.com/f/98231489477.pdf
    • http://vikowezanipe.pbworks.com/f/dedufixuvex.pdf
    • https://uploads.strikinglycdn.com/files/0c212016-7b3d-4e0b-987f-71104fbde2c0/how_to_workout_without_any_equipment.pdf
    • https://uploads.strikinglycdn.com/files/7afb5a72-5697-4388-b53c-13316090670f/89564359979.pdf
    • http://jetubabup.pbworks.com/f/williams_obstetrics_24th_edition_download_free.pdf
    • https://uploads.strikinglycdn.com/files/25a24a86-a80b-43f6-883a-cbd0adc8c325/how_to_open_lexus_es_350_trunk_with_key.pdf
    • https://uploads.strikinglycdn.com/files/02806b7d-5d04-494c-b6af-d91e12d3c392/is_walmart_good_for_america_video_questions.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_off0000e725.bin
8be389982fc9263442903c1531ff148c0b60915c9a774deb60e35bbbe791a1b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 5216 bytes
font_01_sfnt_off0000f8ce.bin
3d6e24476dd6b1c1127fb9c73a90211326e7fed24297cc305c98fd001d2abb27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 11028 bytes

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