Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb97be241b5cdbf…

MALICIOUS

PDF

78.1 KB Created: 2021-03-17 04:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7197b2363e485c11ad72dd897b97d1d SHA-1: 222247e66d22ed659f4d6f49c93687d31d673501 SHA-256: 3cb97be241b5cdbf15f7e2bf2dcffb0653970d7ff9d1dac18862cc302971c20f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely for further exploitation. The document body, though heavily obfuscated, appears to be a lure related to salary information, consistent with phishing tactics.

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
  • 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://bologen.ru/strik?utm_term=how+much+does+an+hr+manager+make+in+california
    • http://tozofuji.scienceontheweb.net/what_are_3_similarities_between_dna_and_rna.pdf
    • https://static.s123-cdn-static.com/uploads/4470524/normal_5ffe5263e0b76.pdf
    • http://rijupoxog.22web.org/arduino_tutorials_for_beginners.pdf
    • http://durugara.iblogger.org/how_to_clean_my_ninja_blender.pdf
    • http://tonevagewalilu.medianewsonline.com/girl_christian_names_that_start_with_j.pdf
    • http://fabikaj.iblogger.org/football_manager_2019_patch_19._3_free.pdf
    • https://cdn-cms.f-static.net/uploads/4393349/normal_604e6fb07405c.pdf
    • http://dinodosum.iblogger.org/google_chrome_64_bit_windows.pdf
    • https://tiwoboromezusud.weebly.com/uploads/1/3/0/8/130874009/0ae679.pdf
    • https://sanajupa.weebly.com/uploads/1/3/1/4/131406847/6542101.pdf
    • https://static.s123-cdn-static.com/uploads/4490746/normal_5ff5a1f76e770.pdf
    • http://xuduzovakuwej.22web.org/castration_complex.pdf
    • https://puritokubopop.weebly.com/uploads/1/3/5/9/135968540/6948625.pdf
    • http://fomijegi.mypressonline.com/dd_monster_name_generator.pdf
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5fcb0b24c31f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://notavopanugatog.epizy.com/5206425299.pdf
    • http://pivirujifija.epizy.com/96538924624.pdf
    • http://wokoziguroron.rf.gd/training_commitment_form_template.pdf
    • https://s3.amazonaws.com/sirilagewuga/ff_bauer_grotesk_bold_free.pdf
    • https://s3.amazonaws.com/xupimaral/yamaha_425_outboard_performance_bulletins.pdf
    • http://ribizotujigotok.rf.gd/missed_call_movie_free.pdf
    • https://s3.amazonaws.com/safenalavojuwu/eclipse_neon_2_free.pdf
    • http://nibemodida.myartsonline.com/67391375456.pdf
    • http://mumomovi.rf.gd/why_wont_my_plasma_cutter_work.pdf
    • http://wififeju.atwebpages.com/lenujerokuja.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_off0000f3e2.bin
94f80aeaed3313808de29915cf16889a6736d7026f7b4d6432adfc6136bf409a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 5552 bytes
font_01_sfnt_off000106a5.bin
9dfc41f6e3955183fe743555af5319045c6788ef5f8ea23d9697e5015860e4ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 10524 bytes

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