Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8880cd1d1319bea…

MALICIOUS

PDF

71.9 KB Created: 2021-02-17 00:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1c52d4176b85e45310f335bf7326f4d4 SHA-1: e65de6ebfdd231317451d54e7d11dfae08b6f399 SHA-256: e8880cd1d1319bea71702c7884a44cf9e9e75ba567e0bf7ba359c18ca8ed5173
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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=chemistry+exam+review+answer+key In PDF document text
    • https://cdn.sqhk.co/jofijoju/XKVgjcJ/68177667712.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/jyMiaJl/zogizamiroxomozeget.pdfIn PDF document text
    • https://cdn.sqhk.co/fofubulami/eXhbjaF/diy_arcade_machines.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/hekazNd/dujub.pdfIn PDF document text
    • http://xiluzoxasefeb.iblogger.org/sogiribixexi.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/mhejaic/lexia_reading_core5_level_1.pdfIn PDF document text
    • https://cdn.sqhk.co/gasosivifug/Qiajgha/28061532520.pdfIn PDF document text
    • https://cdn.sqhk.co/bodevoposuji/gPdRjeu/zotafojijejixemelikokulos.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/hheIthJ/24996266120.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/Yjjhbie/susiveke.pdfIn PDF document text
    • https://cdn.sqhk.co/jadizefon/jjhaQhf/1923282891.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/8Qjd1GH/pefepurepinunakukoxen.pdfIn PDF document text
    • https://puviguwa.weebly.com/uploads/1/3/0/7/130776677/nenow-lapas-wenawopa-fufozewefanepef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387567/normal_600800c62cf44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jebejabekuja.epizy.com/7285007925.pdfIn PDF document text
    • http://kenamumiv.rf.gd/aylward_academy_sixth_form_courses.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_off0000da6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 5184 bytes
SHA-256: dbd972cc2cf5a79cf3bdbf7eba73a7a7a38149b98c125af487000a058f534b87
font_01_sfnt_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 11020 bytes
SHA-256: 05cf8896634ced331bafd3fba1fa7d52bb6a8c37c4cb6265f338fdf05019e542

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