Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9fdfde2828a87d…

MALICIOUS

PDF

77.6 KB Created: 2021-03-31 03:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de89c2f8418379333f880776469dbb4c SHA-1: dc53f6813904d0b02d3c1f0a21c143246804dccd SHA-256: 8f9fdfde2828a87d3293b4975a1f2d9693ea2457b58fb5a03961987fc37d1bf6
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to 'Lego batman cheats ps4' and an embedded URI pointing to a URL that also contains this search query. This suggests a phishing or credential harvesting attempt, or a lure for a malware download.

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://midufefew.ru/wix?keyword=lego+batman+cheats+ps4
    • https://cdn-cms.f-static.net/uploads/4501998/normal_601de44bed2dd.pdf
    • http://ruszaimclub.ru/battleship_board_game_freeawauy.pdf
    • http://poxedon.22web.org/15107556962.pdf
    • https://cdn-cms.f-static.net/uploads/4415930/normal_6046d3127d08e.pdf
    • http://jugatilewe.22web.org/8972899168.pdf
    • http://lakcherie.ru/nupajesavefaromotawizswfah.pdf
    • https://cdn-cms.f-static.net/uploads/4457279/normal_604f0f7deb80a.pdf
    • http://vodizurulenega.mypressonline.com/management_of_essential_hypertension.pdf
    • http://kemedejovon.getenjoyment.net/bachelor_of_architecture_thesis.pdf
    • https://cdn-cms.f-static.net/uploads/4411714/normal_601ca50b66211.pdf
    • http://static-start.top/atal_pension_yojana_formatiy3xs.pdf
    • http://predouche.xyz/12260787845fg2g2.pdf
    • https://static.s123-cdn-static.com/uploads/4421477/normal_6001e6e335be2.pdf
    • http://rollernefritmassage.xyz/how_to_determine_limits_algebraically0mjik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kulegekagaxi.epizy.com/mary_poppins_full_cast_2019.pdf
    • https://uploads.strikinglycdn.com/files/768a210b-2f1e-4f7c-ad85-d64ad1c29aaf/orbit_irrigation_timer_nz.pdf
    • http://bukonepul.rf.gd/dyson_ball_vacuum_attachments.pdf
    • https://uploads.strikinglycdn.com/files/da6ec549-390c-4ebc-9ec8-5789e8c201ef/25944855908.pdf
    • https://uploads.strikinglycdn.com/files/5e4110f7-5805-4840-8c2e-74254840b676/preo_da_mensalidade_do_curso_de_ingls.pdf
    • http://tulajadulixo.myartsonline.com/barorreceptores_fisiologia.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_off0000f0f1.bin
6df8d92cb22858dc039e12310973c08f2c629a0eb9a27e50bb2a93cd95500da4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 5388 bytes
font_01_sfnt_off00010330.bin
61d6fe87aa1307f1a3c7fbb9b829b7111127c0d4742feff8a4d7c769ef14ddd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10330 11480 bytes