Malicious PDF — malware analysis report

Static analysis result for SHA-256 24777ff48cb9d3c8…

MALICIOUS

PDF

85.5 KB Created: 2021-03-11 00:44:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 803b5d8c961f4685e739abdc78237f0c SHA-1: ce55a5923a626bb165183cac32a5f24508f1aea1 SHA-256: 24777ff48cb9d3c84c3c9fd5e93247223c07505d1500e5980b77081bdb78f43a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL points to 'yafferge.ru', which is flagged as malicious. While no scripts were extracted, the presence of a malicious link strongly suggests an attempt to redirect the user to a phishing or malware distribution site, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=romancing+the+bookworm+pdf In PDF document text
    • http://vixifujugafafin.iblogger.org/tokunbo_lexus_es_350_for_sale_in_nigeria.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/dewalt_drill_combo_black_friday.pdfIn PDF document text
    • http://wojournal.ru/mumujoxomutoxoduziva7xm4t.pdfIn PDF document text
    • http://pixell.store/dukekewnh91u.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/ncert_solutions_for_class_11_physics_chapter_2_-_free_download.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/sejenejupilajefupabamofedtpq4i.pdfIn PDF document text
    • http://xijonofupawulo.mypressonline.com/71564437355.pdfIn PDF document text
    • http://jarowulizose.sportsontheweb.net/how_to_learn_calligraphy_writing.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/wefadep/classifying_angles_worksheet_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/lagu_talak_tilu_si_bungsu_bandung.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/91797412360.pdfIn PDF document text
    • http://suzujuvejis.epizy.com/18167737015.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/lipaxulejexatopezi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/127665968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0b6587-7e46-4c8f-bfa4-0517dc9e7b35/79088947028.pdfIn PDF document text
    • http://giguvinelixegol.rf.gd/new_bengali_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/fojurisonotelafafuxesumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75552ce2-6abb-4001-ad7e-4ce5541d5b21/how_does_penelope_know_its_really_odysseus.pdfIn PDF document text
    • http://xanivuva.epizy.com/83858961978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b2f9283-e6e1-4ccf-a6d8-8229f699b276/devuligugan.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/machine_learning_coursera_quiz_answers_week_2.pdfIn PDF document text
    • http://gonoluripep.rf.gd/bootloader_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5675bdfc-a8da-4c59-a64c-32eb5a9fee00/sadisikarinujinasegusenom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A9 5664 bytes
SHA-256: 90a20afa90bc61ae65b8fafef181248e75d8be17b770b7b62b14ef13d768aa88
font_01_sfnt_off000119d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D9 2120 bytes
SHA-256: 593d873fa08423e7ead59b01314a4ee04551ac9d9ef78e6b1dc9d39461d3d42e
font_02_sfnt_off0001237c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237C 10736 bytes
SHA-256: a32004688225a6dba683360d6cdd1349886f415b5c33866a26918f2e6161a197

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