Malicious PDF — malware analysis report

Static analysis result for SHA-256 646c447b44597ab8…

MALICIOUS

PDF

69.1 KB Created: 2021-03-05 22:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 759d911ebdd7fe9ce23ca140b9533979 SHA-1: 52c296e1e4145ab754982124200ccb3ebf655b0f SHA-256: 646c447b44597ab8a6889274d257a61e2a94fdf4b7f29cc58e285ce98f47e49a
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 high risk score. It contains an embedded URI pointing to a suspicious domain, 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The PDF structure and embedded content suggest an attempt to disguise malicious activity as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wix?keyword=marketing+mix+worksheet+answers
    • http://idealicaitaly-ufficiale.site/79488413694dy4wy.pdf
    • https://cdn.sqhk.co/zokosofu/iajgiaD/giguwigafetibuxerumo.pdf
    • http://bumaga.bz/bethesda_launcher_slow_speedq0icg.pdf
    • https://cdn.sqhk.co/sifolilo/gdRrod1/english_crossword_puzzle.pdf
    • http://copyrights-notices-helps.com/gitlab_ci_template_scriptmkfgt.pdf
    • https://cdn.sqhk.co/zanaforare/gjd82hb/define_feisty_in_a_sentence.pdf
    • http://insta-sale.site/bluetooth_serial_terminal_windows_7_downloadc2bho.pdf
    • http://austritkfa.com/tarokavog1e2yu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fovezewi/amazon_double_bed_sheets_299.pdf
    • https://s3.amazonaws.com/fajetufekejo/30155200777.pdf
    • https://uploads.strikinglycdn.com/files/e0e5fd56-00b1-4564-8dc8-a0d1cbe3bfe3/wuvejevevedumejano.pdf
    • https://s3.amazonaws.com/wozoxub/6849152888.pdf
    • https://uploads.strikinglycdn.com/files/f0805064-229b-437d-a4e1-d9d50cd90dee/turbochef_pizza_oven_cleaning.pdf
    • https://s3.amazonaws.com/xefejevife/piwibi.pdf
    • https://s3.amazonaws.com/xeponodij/a_level_biology_revision_guide_aqa.pdf
    • https://uploads.strikinglycdn.com/files/89517ab7-b5c3-457f-a211-2bd232426e96/77274112510.pdf
    • https://uploads.strikinglycdn.com/files/a566adf1-4aed-4a49-8aa7-6e07729249a3/latukewujaniramefovoni.pdf
    • https://uploads.strikinglycdn.com/files/c839d370-f02e-4012-bcdd-91d62e88aa16/nizuwigiz.pdf
    • https://s3.amazonaws.com/guxosa/bacteremia_guidelines_e._coli.pdf
    • https://s3.amazonaws.com/mejigavukolu/19333032290.pdf
    • https://s3.amazonaws.com/jeduzizonox/moganenepasif.pdf
    • https://uploads.strikinglycdn.com/files/e9d6abae-765b-4b37-b487-0f690283b3fa/33611396162.pdf
    • https://uploads.strikinglycdn.com/files/0a0483b0-a141-4ab1-80d8-06e4eb639fcf/52646826887.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_off0000d289.bin
d7b7a809b58d4ea051a91a166f7ef373ee45b6e057edf0c691d6f9405d420d9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD289 5296 bytes
font_01_sfnt_off0000e487.bin
d9788ff65e41cc599974c2ff0d4dbb7a65b8338c7b0d47bccf6a1ccf32b52908		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 10292 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.