Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b718071fe5e38e2…

MALICIOUS

PDF

80.2 KB Created: 2021-03-21 02:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0cb363c4dbb755b3d39fd59776865b9 SHA-1: 5b79f88065f382e8b7e885051b5b72bf1a6349d2 SHA-256: 5b718071fe5e38e2402509c964e5301dd1f46b5aabf2e29eaa99175704072a21
96 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a 'Ny state science test grade 8 schedule'. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=ny+state+science+test+grade+8+schedule
    • https://suzitarux.weebly.com/uploads/1/3/4/6/134683800/186d7c.pdf
    • https://cdn.sqhk.co/morureju/hnzrhiS/nufif.pdf
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/c46b0cde043ede.pdf
    • https://zobimodajozo.weebly.com/uploads/1/3/4/3/134340865/ea45f38.pdf
    • http://nerroba.info/vegetable_recipes_for_weight_lossw3u6n.pdf
    • http://xunetokawetik.sportsontheweb.net/how_to_add_text_to_a_file_windows.pdf
    • https://teduruperalugo.weebly.com/uploads/1/3/4/3/134320262/5996705.pdf
    • http://sosiwawivijomo.scienceontheweb.net/bible_king_james.pdf
    • http://216tilford.com/18122434046sp5mx.pdf
    • https://cdn.sqhk.co/zatugudaxaji/jagch2u/64360019395.pdf
    • https://rujemezemomiwo.weebly.com/uploads/1/3/0/9/130969750/fifujefegomatovegope.pdf
    • https://cdn.sqhk.co/xuxofidipo/cOgghfM/high_jump_goal_in_football.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_1e173f635acb47948afba74a2bfc69d6.pdf?index=true
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_d2e8ec0bfdc44df38af45e5a3a97ef0b.pdf?index=true
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_880b8d48fed7469394ac996df088edfd.pdf?index=true
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_4d8f3714eb244ad1becf7cc3478bdf0a.pdf?index=true
    • 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_off0000edc0.bin
0459295a124470fbc8d772a3c34504b25439641899cc2d67489e2e0ed3da8583		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 5468 bytes
font_01_sfnt_off0001005d.bin
9fb5c5d4048b491830855014d24b95c0884abea6a19f1af30a128ded6e321bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1005D 22488 bytes

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