Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1885d554ce60cc…

MALICIOUS

PDF

75.3 KB Created: 2021-01-10 22:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 24881d4936ca4a0750f49d1abdb072c9 SHA-1: 77efa69f8a1d65aed1ae4320cf447ddb01293605 SHA-256: 7b1885d554ce60ccdb95163638b109c9b391d80e5dc45f71c425a362c968e2c9
154 Risk Score

Malware Insights

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

The PDF document contains a URL that is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to medical information, likely to trick users into clicking the malicious link. The presence of a malicious redirector URL strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=how+to+deal+with+hallucinations+in+lewy+body+dementia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f87196365214.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/gefm3DY/64699988157.pdfIn PDF document text
    • https://cdn.sqhk.co/sewetotab/Ageghie/get_followers_and_like_simulator_clicker_game.pdfIn PDF document text
    • https://site-1168513.mozfiles.com/files/1168513/romantic_ringtones_free_download_in_tamil.pdfIn PDF document text
    • https://site-1174218.mozfiles.com/files/1174218/real_bad_motorsports.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5f8d0d9e990a8.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/suzixegazunow/wolfram_mathematica_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/calculator_vault_apk_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/lazebelexuzip.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/32350495198.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/20201869555.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/seditivor.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/kabootar_information_in_english.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_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 5380 bytes
SHA-256: 33fadea8db03533beb85f64c184738cca059dd40d29c9aad43f35fe3ab35e08d
font_01_sfnt_off0000fb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6C 10960 bytes
SHA-256: 300f2e249da396b837feb5c94637b5d1ce7dc3646f631f3dd1554fc3cf4878c7

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