Malicious PDF — malware analysis report

Static analysis result for SHA-256 815546fc80799916…

MALICIOUS

PDF

68.8 KB Created: 2021-02-09 17:10:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: af5adf76cf87f04beee71429bc4b6d6b SHA-1: dc4583b8e19a30beffa9988b58062e0c79fb5cd3 SHA-256: 815546fc80799916336ba18e7f3a139e3989bac7ffb1e0d87035f39894a177e9
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://seumenha.ru/wb?keyword=descriptive%20writing%20examples%20ks2%20pdf PDF link annotation
    • https://cdn.sqhk.co/kekotenonaxu/5icgcXC/59717195825.pdfIn PDF document text
    • http://blu-ital.space/maths_frameworking_3.3_answers9ed73.pdfIn PDF document text
    • http://fikodon.iblogger.org/23106991378.pdfIn PDF document text
    • http://pikaromabunoteb.iblogger.org/36388327716.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/admin_logging_ark25kfi.pdfIn PDF document text
    • https://mugibamarenov.weebly.com/uploads/1/3/4/1/134109107/kugamuradobafarum.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/124882616423a67y.pdfIn PDF document text
    • https://cdn.sqhk.co/wovovoteg/uifhbdm/100_bad_days_lyrics_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/0jjjfgj/cafe_racer_jacket_style.pdfIn PDF document text
    • http://zapazereti.22web.org/928019989.pdfIn PDF document text
    • http://itayoga.space/ms_dos_7.10_downloaduel52.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/boxalewijim/install_kali_linux_on_android_termux.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/bumekewezodemase.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/computer_hardware_servicing_curriculum_guide_grade_9.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/eg_industries_berhad_annual_report_2018.pdfIn PDF document text
    • http://vovugezufined.epizy.com/54438254897.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/69670340246.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/tovege.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBD 5888 bytes
SHA-256: 7afe540a848ce271f3347b4611a9a44d8820e3783f695e72581812be9d6f0519
font_01_sfnt_off0000e3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 9920 bytes
SHA-256: bd1fdeb20618a9b7e55d8a39005eb6db9932a825c6cd072a3a893072f5f1d7b1

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