Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77ee56c214a43fc…

MALICIOUS

PDF

72.6 KB Created: 2021-02-16 03:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ace75038510fd2c92a48f1c28482adb2 SHA-1: b3d31c266cd3479e4011a1b311bef14c4e710659 SHA-256: b77ee56c214a43fce2ed0a3e1d39ba7a368d1f7a5f1d2083f9603c9247b65de1
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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=personal+management+merit+badge+budget+spreadsheet In PDF document text
    • https://buderenedisam.weebly.com/uploads/1/3/5/3/135302361/2814095.pdfIn PDF document text
    • http://shoop-ft.ru/drm_free_dlc_xbox_360_listp08vn.pdfIn PDF document text
    • https://tejojobowadame.weebly.com/uploads/1/3/0/8/130874570/wukokafidedumu.pdfIn PDF document text
    • https://setixifofu.weebly.com/uploads/1/3/1/6/131606861/mujegajurarap_joxewo_rovitofarafumok_rutativazapedus.pdfIn PDF document text
    • https://mufajagirudul.weebly.com/uploads/1/3/1/4/131452858/77abf8af69e9c2.pdfIn PDF document text
    • http://boretibixakofer.iblogger.org/brian_crain_hallelujah_sheet_music.pdfIn PDF document text
    • http://pocki.top/andaman_and_nicobar_islands_travel_guide6e9il.pdfIn PDF document text
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/talokusevu.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/wujafivabipo/84083538810.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/paper_roll_to_sheet_cutting_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/tuxoludafek.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/create_outlook_email_template_with_attachments.pdfIn PDF document text
    • http://wewonak.rf.gd/babir.pdfIn PDF document text
    • http://dovobol.epizy.com/76035102823.pdfIn PDF document text
    • http://sejekaxupoze.epizy.com/aisino_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/zawemowigod.pdfIn PDF document text
    • http://gonidiwofove.epizy.com/fawadutuvixomafixikavux.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/53270565404.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/computer_ka_full_form_english_me.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_off0000de66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE66 5516 bytes
SHA-256: e91fd4f886238f2daab1219c16e1c29c486d7cf66381d437f022b623cf3e236a
font_01_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 10476 bytes
SHA-256: 9793c2611760a2eb6d07bfe26ac532c9aba45c9e8862c670eebcc59e377176b0