Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97eb0643dfcc3b4…

MALICIOUS

PDF

77.6 KB Created: 2021-03-27 19:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7472f3bb44e7c75e1b7c5d311e26da22 SHA-1: 0f28feae1042374f9b8da2c580e78022fa7ec126 SHA-256: b97eb0643dfcc3b409eb6a960d3434dcb85b790b3184eb25615caa5ce9bc5aa7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains obfuscated text and an external URI pointing to a URL that appears to be a phishing lure. The ClamAV detection and ML classifier strongly indicate maliciousness. The primary IOC is the external URI which is likely part of a phishing campaign to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/award?keyword=asfixia+libro+pdf+descargar
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://itawegan.fun/abraham_lincoln_very_short_biographybn9oh.pdf
    • http://lamanixumerad.mypressonline.com/cds_2_syllabus_2020.pdf
    • http://kedugobepuged.mywebcommunity.org/12967463867.pdf
    • http://bewewafip.scienceontheweb.net/monster_vs_aliens_episode_11.pdf
    • http://baditunabupiru.mywebcommunity.org/10th_new_maths_guide_2020_to_2020.pdf
    • http://tufofol.medianewsonline.com/degradacin_definicion.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wisuw/calcareous_soil_properties.pdf
    • https://s3.amazonaws.com/pugomonapoxuxe/pepojuloloner.pdf
    • https://s3.amazonaws.com/sisaxu/to_kill_a_mockingbird_free_worksheets.pdf
    • https://s3.amazonaws.com/tufujifinobiro/72776463288.pdf
    • https://s3.amazonaws.com/sezewu/fepabozazalufetetedije.pdf
    • https://s3.amazonaws.com/padosumifubobo/wisc-iv_subtest_score_interpretation.pdf
    • https://s3.amazonaws.com/gajakelegeza/bhoot_horror_sound.pdf
    • https://uploads.strikinglycdn.com/files/2498b38a-622d-46c4-a9ef-803b29acd49a/how_to_add_page_in_wix_editor.pdf
    • https://uploads.strikinglycdn.com/files/a8c8d7be-e087-4e4d-a2d1-9abd41f950cc/massey_ferguson_1655_loader.pdf
    • https://s3.amazonaws.com/nonipesikiri/how_do_i_get_audio_output_from_my_tv.pdf
    • https://uploads.strikinglycdn.com/files/d2f251a4-d61d-4511-a41b-6d6fefd49a38/how_to_remove_palmers_coconut_oil_formula.pdf
    • https://s3.amazonaws.com/memexelu/indian_civilization_and_culture_question_and_answer.pdf
    • https://uploads.strikinglycdn.com/files/3ad0c867-ab2f-43eb-88aa-d79071afe9e2/weber_grill_parts_phone_number.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_off0000ec88.bin
44b8ec181a9bf429c9d9594383d2396ced614bdfe9401c0c21616b5e3fa22878
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 5520 bytes
font_01_sfnt_off0000ff5c.bin
7bef2715917dff60cfe9131d436bac1d9ed2e9ec6ab9d973f1f96798c1652d52
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5C 12408 bytes