Malicious PDF — malware analysis report

Static analysis result for SHA-256 792d8a4f100fa82c…

MALICIOUS

PDF

76.3 KB Created: 2021-02-19 21:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fbe8c0848487ee010489a12d21b2cd1d SHA-1: fc90079fcf653036d39613abc9e24aacb652d527 SHA-256: 792d8a4f100fa82ca1fa325c4df55d9cc90b5a1d595dd2cdd05d03eaf0cf5ad2
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/123?utm_term=how+to+build+a+septic+drainfield PDF link annotation
    • https://cdn.sqhk.co/jefapukawore/XTidX9y/51435030143.pdfIn PDF document text
    • https://cdn.sqhk.co/sokavuwoz/ifjiigM/95649430774.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/Kzijmuf/malayalam_stickers_dialogue_meme_chat_texting.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/4yMhcc1/switch_pro_console_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/ijXfhci/2755070634.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/usPgfje/68793131003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_60152f4a5857e.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/Fhghg47/32826343895.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/jboiipC/46719133319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468255/normal_5fe1099ca4436.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/gchjYqz/debelapepufejezifupimaz.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/ij3hgqc/tijiwunizuxuxozokutega.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/hchOehh/semikowomogadobuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_60275fb789701.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/tejuvonixag/22923150041.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/43194838114.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/financial_reporting_manager_salary_london.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/american_bald_eagle_facts_and_information.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_off0000ee1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 5344 bytes
SHA-256: 77ac93000f2e91a00d57188df340edcf2c45d9d3de24f2e86e3937493692a27f
font_01_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 10584 bytes
SHA-256: 2c5a66e13796b33d59e304d292ccf775d2c402793d5789700f149343be9ca509