Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1df54dcd28f8ec…

MALICIOUS

PDF

84.4 KB Created: 2021-03-20 15:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1374db25959eac4379c516e921c8d9c9 SHA-1: d1352f22c1d677e90fc20085ef8daf76cdf7b312 SHA-256: 7b1df54dcd28f8ecade4a57786fa38c8919905cbebe794c737b752c6e679f07d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'fokemale.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to the URL, reinforcing the malicious intent. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly indicate a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=what+does+phantom+of+the+opera+mean PDF link annotation
    • http://tizelobira.22web.org/liwoxoxudinaluka.pdfIn PDF document text
    • http://didanak.22web.org/94302796857.pdfIn PDF document text
    • http://zapixexarepol.medianewsonline.com/rirafuwibegarotimuv.pdfIn PDF document text
    • http://wanezus.scienceontheweb.net/16694440660.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/hindu_boy_names_starting_with_k.pdfIn PDF document text
    • http://fisitupogavi.mypressonline.com/b_tech_electronics_syllabus.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/pdf_bestand_verkleinen_windows_10.pdfIn PDF document text
    • http://kipivejezijab.iblogger.org/61363469388.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/robumuduluwise/pezifenuxefosewiton.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/rigamonizatumekupa.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/wow_fangs_of_the_father_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/platformio_serial_monitor_echo.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/mebezexe.pdfIn PDF document text
    • http://rowoniwetob.atwebpages.com/alesis_qs8_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/android_play_store_icon.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/o_que_so_coliformes_termotolerantes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b653ba55-39db-4862-97df-5d7d09dab8a3/lazukilun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c690ce5c-770b-4299-96e1-9e032efab750/how_to_check_your_sexuality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc6581f-d24f-40b7-90fa-630c71e5ba97/buwupirikesobo.pdfIn PDF document text
    • http://teluroluxeterez.myartsonline.com/dictionary_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/kuzigewiwajilaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fad8181-93b9-47d6-a681-12ea3c7cce03/show_me_all_the_diary_of_a_wimpy_kid_books_in_order.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_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 5264 bytes
SHA-256: a61dc761fb551cc47ab58f95f9a76f3b54acc3014c74fa04dfcce3cbdb56dd3c
font_01_sfnt_off00011dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDA 11824 bytes
SHA-256: 7dc26586a093fd99e98c68bbe879bb77732c5f73fcef969fbbc04aa929a3e494

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