Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ebf615e95c4cce…

MALICIOUS

PDF

88.1 KB Created: 2021-03-10 02:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 716eadf2aa7a5e126bf3a22d140d0e04 SHA-1: 5547eb78fd846ac8a1075666215d5176203033d9 SHA-256: 98ebf615e95c4cce8bd6ccf1d414a66c3c106fde9dd60d5532a439d32742a9e8
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 specific detection name indicating it's a phishing trojan. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading unwanted software. No scripts were extracted, but the presence of external URIs and the phishing detection strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=videoder+app++for+laptop
    • http://nat-yoga.space/php_rest_api_tutorial_for_beginnerswn3c8.pdf
    • https://static.s123-cdn-static.com/uploads/4427085/normal_5fdd31bd9acde.pdf
    • https://cdn.sqhk.co/zubejavaxuvu/ighjege/block_hexa_daily_puzzle_answers.pdf
    • https://cdn.sqhk.co/digipexula/gdYDifq/pisijadijet.pdf
    • http://cparta.moscow/escuela_de_psicologia_humanista_mexicoehhii.pdf
    • https://tetoferapijala.weebly.com/uploads/1/3/1/6/131606168/f54e2a.pdf
    • https://cdn.sqhk.co/repejuvovod/cjehfND/55762412666.pdf
    • https://cdn.sqhk.co/wakivugex/hgfpqCI/72486442508.pdf
    • https://cdn.sqhk.co/sadetujadufi/gfibghP/my_talking_cat_2_mod.pdf
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/96926.pdf
    • https://static.s123-cdn-static.com/uploads/4402519/normal_5fff5bc6dc790.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wowonesoribu/cargo_manifest_template_free.pdf
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_7efb0a85b52048b29c112297661a3619.pdf?index=true
    • https://s3.amazonaws.com/leteraxewe/how_to_start_learning_table_tennis.pdf
    • https://s3.amazonaws.com/jiwisi/71487802861.pdf
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_07a2b413c1d8410791cd5f6c87a20aa8.pdf?index=true
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_d89e2eb87dcc404cb3a23c668b6e1bc8.pdf?index=true
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_003029c9ab5d4ed7bb5da6a25a241299.pdf?index=true
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_d50fdeffb3554d478a72874fa3e8587f.pdf?index=true
    • https://s3.amazonaws.com/jovekus/gepexezupezilabanu.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010851.bin
74806dabed22bb2dd1cfb2a52c5e3d093e4549e65c12b76ff98748807f8fee6e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10851 12800 bytes
font_00_sfnt_off0000f7dd.bin
1bb37571f14848c1a0af32ebc459a11fce1fe6057d1390bfdce566d46130fb83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DD 4824 bytes
font_02_sfnt_off00012d34.bin
8126b8a8ee929c53a058dac553b67ca1d54f66b882dc3fb53af65429acbd6800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D34 11476 bytes

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