Malicious PDF — malware analysis report

Static analysis result for SHA-256 961117c839913804…

MALICIOUS

PDF

72.2 KB Created: 2021-02-06 19:33:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 474c92c0ea20b0f452346cce1c12ad5c SHA-1: 7cbd32d29b329ca1fc095d47c904bd408db6b50b SHA-256: 961117c8399138047483e5a75d4577658c9d4bbfcbb0d44317d006f9a84623d3
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'lab report'.

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://bologen.ru/aws?utm_term=mendelian+genetics+corn+lab+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489237/normal_60149714a569d.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/tWjdEMt/lumifular.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/jfc7Fxh/free_cars_glitch_gta_5_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_601465ea1fe65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5fe8fc6f4ec4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_60109c289e1ce.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/eegd5ex/blaze_and_the_monster_machines_games_for_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_600f158051ff2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481157/normal_5fde2d9ab232b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448743/normal_5fec9cb0b0e2e.pdfIn PDF document text
    • https://cdn.sqhk.co/megilujij/ahhRbAX/24603314258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5fd2d93ccadf1.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/hiejcCC/xezotepaxigodizujorakezot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480897/normal_5fe251fbc8465.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/PhHeBic/70301377257.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/jiwisigetizoxif/worlds_hardest_math_equation_with_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/cbs_3_philly_news_reporters.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/17644370438.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_off0000dd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1D 5384 bytes
SHA-256: 787ff225f436959be895599352f833383d23bb31d85158e552a5d6a55c1a4688
font_01_sfnt_off0000ef84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF84 10712 bytes
SHA-256: 3665af6cd4d10968be2b6dcc0b8d9e10b23cd8bf19f5dc0901fdea45c70db25c

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