Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3477598c29b9b83…

MALICIOUS

PDF

64.0 KB Created: 2021-02-20 23:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5cfa2f95f8aac2f225ff390cfbe0e7f0 SHA-1: 5746a6fc0e3cc7d73df847c482b14af570dc2acb SHA-256: c3477598c29b9b83ebefe0f8672b4b0326b1b551c2a96660debcf52126b38d41
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=boyle%2527s+law+worksheet+chapter+16+answers In PDF document text
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/wuwiximizot.pdfIn PDF document text
    • https://dapiridefurewej.weebly.com/uploads/1/3/5/9/135987432/438ad2fdc.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/iiwKibY/my_android_phone_is_slow_on_wifi.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/aiauWic/smart_and_final_turlock_application.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/7e1cc4e8a.pdfIn PDF document text
    • https://cdn.sqhk.co/nojumuku/byiekvc/swing_low_sweet_chariot_chords_ukulele.pdfIn PDF document text
    • https://surigogalabilix.weebly.com/uploads/1/3/5/9/135961506/jukoxolowiki-xuxedinaz-lamaxitogulel.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/htOPCKT/78193577371.pdfIn PDF document text
    • http://raisinshq.pro/jexixakebipigenapinigasowe4289.pdfIn PDF document text
    • https://gefivepuli.weebly.com/uploads/1/3/4/6/134620723/jajodejokagosenemag.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/dedupurivezorod.pdfIn PDF document text
    • http://classicalnaturally.com/geridararn6okc.pdfIn PDF document text
    • https://bofipafora.weebly.com/uploads/1/3/0/7/130776763/napoxazoboko-getobi.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/dupula/67588050637.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_off0000be35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE35 5568 bytes
SHA-256: 1a07d31bc13a1d6e19a94c80d48ed603d9ac963f2195536527227f70d81b8588
font_01_sfnt_off0000d156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD156 9784 bytes
SHA-256: 2312a6516fd1a987d539a6fb8a48e9de16b9f9ea0725c90d91fb4d0f72f2a760