Malicious PDF — malware analysis report

Static analysis result for SHA-256 65cc113d5952f537…

MALICIOUS

PDF

74.9 KB Created: 2021-02-26 03:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c0e56d66499842887bddf793771289d4 SHA-1: 1a052ee242a7277e99e350355bb4f585c38306d3 SHA-256: 65cc113d5952f5376c6708ce59855e54d5e352e3be96a1bf714158c096b6903d
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=domestic+sewing+machine+manual+pdf In PDF document text
    • https://mekowisegopoju.weebly.com/uploads/1/3/5/9/135963570/funigorelugenexepip.pdfIn PDF document text
    • https://cdn.sqhk.co/kipasewimoni/jeqAicm/pixel_worlds_discord.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/BbidgfR/anger_of_stick_4_apk_free_download.pdfIn PDF document text
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/maxanogali-xudosazamapaza.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/Jiijfhg/buzavamalimamiredodapuke.pdfIn PDF document text
    • https://cdn.sqhk.co/lexujowina/cPPFiiI/planet_earth_pictures_cartoon.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/voteb_kezoni.pdfIn PDF document text
    • https://salubekera.weebly.com/uploads/1/3/2/7/132740515/gotobumuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/ie6jcia/review_rechargeable_hearing_aids.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/zlEidgj/82994412815.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/fukepez/wireless-n_300m_router_repeater_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/wallpaper_hd_for_android_white.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/27187673447.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/52843619515.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/95627645878.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_off0000e8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C4 5564 bytes
SHA-256: 94b58d8bae25be0ea3edf3999169709204ba3e0cf82c9c9a6ed063f5265f9d22
font_01_sfnt_off0000fbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 10284 bytes
SHA-256: 6a9f007552b116a09dad5cd9b5221e3d5e3cea428c9a4c06d3d9a4c34b757306