Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5fedcd846bbc23…

MALICIOUS

PDF

74.1 KB Created: 2021-01-31 03:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 43cc59821d6a49c9633c50bdbedb67a2 SHA-1: 25fa3d7fb7176af9085844fc241271f2afc086cb SHA-256: fa5fedcd846bbc23826c3a820f0a5a08362aabe2aea64bd6f0024e17f51e9b35
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to medical information, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=secondary+amenorrhea+causes+pdf PDF link annotation
    • http://labiluwewinedu.22web.org/tegitejupejezojedowixipel.pdfIn PDF document text
    • http://mstmail.space/cdc_guidelines_for_clostridium_difficile_testingwvqe8.pdfIn PDF document text
    • http://3203epworthcres.com/chacun_sa_nuit_20061up98.pdfIn PDF document text
    • http://spainsale.pro/por_13_razonesrznb8.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/niwotipugonuvoz/kodaline_moving_on_piano_sheet_music.pdfIn PDF document text
    • http://toraxetutat.epizy.com/latex_book_template_fancy_design.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/attributeset_programmatically_android.pdfIn PDF document text
    • http://watijosanowo.epizy.com/51777125096.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/chivalry_medieval_warfare_non_steam.pdfIn PDF document text
    • http://xuperag.epizy.com/1412970971.pdfIn PDF document text
    • http://kupavojos.epizy.com/revelation_song_piano_sheet_music.pdfIn PDF document text
    • http://pixoriwabivonol.rf.gd/bojukozuzuta.pdfIn PDF document text
    • http://porokeziz.rf.gd/35343768095.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/fuvogedulazekipi.pdfIn PDF document text
    • http://vunowilivazadul.rf.gd/art_software_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/ingersoll_rand_air_compressor_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/nizurapasotuketipupanoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/cnbc_fast_money_halftime_report_twitter.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_off0000e4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 5568 bytes
SHA-256: e86de8c8f762967c65b7e008f288ca83a34363c9c1d65092dd344402f8e4e504
font_01_sfnt_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 10432 bytes
SHA-256: 6fdca98c8b6984e1fd92efb8fc1f188dde855208b7ef4fa9b4c90b18002ec1b0

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