Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd7a63d003c3d97…

MALICIOUS

PDF

78.7 KB Created: 2021-04-04 01:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3e5461c3478b80b8d01da8c219ee2839 SHA-1: 7236615bf271689a32a2e92cdf7a97e1568b2c1c SHA-256: fcd7a63d003c3d975fe12a73f44d0e273d9a95f44d3167c2d6738944d00d150c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://mezovuduw.ru/123?utm_term=transferir+backup+whatsapp+do+iphone+para+android PDF link annotation
    • http://parralax.net/is_mathematical_analysis_hardba6qs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_60673e544d32d.pdfIn PDF document text
    • http://forkidsshop.online/2496936934oago7.pdfIn PDF document text
    • http://smartroom.pro/domejepewixaregujn3nd2.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/asjh0jf/45467071946.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/hbigQig/best_craft_glue_for_metal.pdfIn PDF document text
    • http://natorg.fun/akbarnama_hindi_download6zqe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419630/normal_6059d56992745.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/gjhiMij/sector_14_faridabad_haryana_pin_code.pdfIn PDF document text
    • http://50offshop.pro/after_we_collided_recapfl6z4.pdfIn PDF document text
    • http://espaceclient-cmb.com/kituxibekomuvagedenz6nnh.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/hiULjhq/27764906455.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fe03b0b05ff7.pdfIn PDF document text
    • http://coins24h.com/57820993044w77o5.pdfIn PDF document text
    • http://distornyup.site/supply_chain_management_certificationznmk0.pdfIn PDF document text
    • http://zahlungsservice-ch.site/telugu_movies_dubbed_in_tamil_tamilrockersj77sw.pdfIn PDF document text
    • http://zuzudijibogojag.22web.org/62804903327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nuvavevuk.rf.gd/basic_mathematics_formula_for_competitive_exam.pdfIn PDF document text
    • http://waboxizolomove.rf.gd/82945359936.pdfIn PDF document text
    • http://wetoxisifogif.epizy.com/worthy_is_the_lamb_guitar_chords.pdfIn PDF document text
    • http://suginuzebaluwom.rf.gd/29706270467.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 5340 bytes
SHA-256: 62aae7c3ec2a3c445828275c143f88e77aa846ebdc161f67283010351886e583
font_01_sfnt_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 11352 bytes
SHA-256: 804d10936a9267849825e0b6262e2e9a82922d7c0a2ba2862276f8555dd41520
font_02_sfnt_off00011f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F38 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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