Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ec1210ccd81678…

MALICIOUS

PDF

67.7 KB Created: 2021-02-22 22:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2f5d300073f909fe6d7a0e74bbb01a63 SHA-1: 1a56a6aa5ea3e18900034c15a26789bbc466a6bf SHA-256: 88ec1210ccd81678d1cacb7c1693b82349f339d4f1c9cce4f1da21cab27f9083
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=lines+police+cad In PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5ffe856488e99.pdfIn PDF document text
    • https://xalojuxovev.weebly.com/uploads/1/3/0/7/130774978/a8b6e7c2a.pdfIn PDF document text
    • http://hotita.space/42886314135s0p8r.pdfIn PDF document text
    • https://bejokezogakuji.weebly.com/uploads/1/3/2/6/132695802/e5b22708e3ff906.pdfIn PDF document text
    • https://visuriteja.weebly.com/uploads/1/3/5/3/135323353/vaguduvaxazotarix.pdfIn PDF document text
    • https://lukizodik.weebly.com/uploads/1/3/4/4/134458766/6af91c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490265/normal_600babb3e71e5.pdfIn PDF document text
    • https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/zubezurab.pdfIn PDF document text
    • https://sizamefoz.weebly.com/uploads/1/3/2/7/132740636/7294259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413125/normal_5ff5310e202c8.pdfIn PDF document text
    • http://ipatovaalena.ru/vugudatofowejiskvg48.pdfIn PDF document text
    • http://bluetea.space/dirusa5fi91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5fec1bac6ce45.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/datupivi.pdfIn PDF document text
    • http://datingdate.site/kenmore_washer_parts_near_mef66tk.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/mujevubutukoxu/ruwavowid.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/editable_flyer_templates_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/sarkari_result_ssc_je_2018_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/19271455198.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/family_addiction_recovery_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/dabolapulijimolala.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_off0000cf45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF45 4912 bytes
SHA-256: 367358e663d87a98b3c629d8d8ce7192e309ce74c6cc167b81c1c95aab9a0395
font_01_sfnt_off0000e010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE010 9872 bytes
SHA-256: d34cb8243ce747c77efecaf2d6036a9b262f02bb99593d59a7501e20fb9f1baa