Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3fabd497d3cb7e…

MALICIOUS

PDF

73.3 KB Created: 2021-03-27 23:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 799020640b8de4dab04a14bb5c5afc1e SHA-1: 5bbfd42ecdc26a1b6fa832de013973afd918ada8 SHA-256: fd3fabd497d3cb7e6a53cd3a636057dee448300db730183c901dc0f1a049f150
96 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs, one of which is `https://fokemale.ru/123?utm_term=developing+countries+list+2019+pdf`. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/123?utm_term=developing+countries+list+2019+pdf PDF link annotation
    • http://successinyourlif.website/bobcat_e45_service_manual5bgxo.pdfIn PDF document text
    • http://bunutib.mywebcommunity.org/tomb_of_annihilation_board_game.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/ZXghicy/youtube_eagles_greatest_hits.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/YAgib5l/60717207667.pdfIn PDF document text
    • http://zozitaze.mypressonline.com/why_is_my_roomba_900_not_charging.pdfIn PDF document text
    • http://francobusiness.com/how_to_build_a_dirt_road_on_a_hill0swbw.pdfIn PDF document text
    • http://ipatovaalena.ru/924429969990x98x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/yeh-shen_a_cinderella_story_from_china_by_ai-ling_louie.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/the_barbell_prescription.pdfIn PDF document text
    • http://rupesujutiwu.myartsonline.com/tadodib.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/forasizapoduwuteta.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/21418346114.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/nogimekaninafofuka.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/golub.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/tiebreak_contact_ls_dyna.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/confused_face_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/tensorflow_for_machine_intelligence.pdfIn PDF document text
    • http://guriseb.myartsonline.com/aptitude_test_preparation_book.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_off0000e096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 5652 bytes
SHA-256: bf2370ab18d561484d358759a6b4adf8c4f1aab742a8cb1724ed64a6e6f457cd
font_01_sfnt_off0000f405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF405 10556 bytes
SHA-256: dc4d0921fc617445c16b71c9602194b828d37b1a475760b8c7d0268ed15de7fc

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