Malicious PDF — malware analysis report

Static analysis result for SHA-256 6879bf02596899e7…

MALICIOUS

PDF

61.8 KB Created: 2021-01-26 21:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9a2f668597e7c3807c666b04b84e0d12 SHA-1: 9a84f2368485d0454ad83bb1fb39dd9c888d5c14 SHA-256: 6879bf02596899e78618f42f4907f8eb5651b96b05fc5b73aa24ee1adb01779c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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/wb?keyword=cool%20rock%20guitar%20ringtones In PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/8hepUgi/dragon_quest_x_switch_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470226/normal_5ff349d53bc57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_600c44b5c409c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_6002fc707dbe3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447465/normal_5fe0cfcb89d80.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/giiujj4/38626874272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_600c059fafdd4.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/MFijrnq/kijogukojelexapubufo.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/xajowu/7293591496.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/washington_boaters_course_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/16638561016.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/sociologija_religije_hamilton.pdfIn PDF document text
    • http://rezumasalimod.epizy.com/autotune_free_online_no.pdfIn PDF document text
    • http://rusakarazixano.epizy.com/buvalip.pdfIn PDF document text
    • http://kokiralasido.epizy.com/capsize_overturn_answers._com.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_off0000ba85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA85 4936 bytes
SHA-256: 5fdc2bc0723e5e67fdf77b37134275cc94ed511734bd47840a33aa3785da9243
font_01_sfnt_off0000cb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5D 9096 bytes
SHA-256: 21dbe114d9592ca2fb93c21a3775a687e38721ba69145f4f25bba880c31b9dc5