Malicious PDF — malware analysis report

Static analysis result for SHA-256 6500bee0b2fcf880…

MALICIOUS

PDF

81.4 KB Created: 2021-02-06 09:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dea9d14c2f167a4e37c6f6522719c869 SHA-1: efaca5c7cae5bf8632186e89937a28b5cd4922d5 SHA-256: 6500bee0b2fcf8804b226681e13b75b2b338b16268204f827a17f7de28b89abc
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/wb?keyword=almost%20is%20never%20enough%20karaoke In PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/posujavupado.pdfIn PDF document text
    • https://kivinogafuwej.weebly.com/uploads/1/3/4/7/134702495/nepegune_lujadoteve.pdfIn PDF document text
    • http://jofijuke.22web.org/android_tv_box_raspberry_pi_3_b.pdfIn PDF document text
    • https://luzenesezenobo.weebly.com/uploads/1/3/5/3/135307250/5eb90a05e61e.pdfIn PDF document text
    • https://xozejobe.weebly.com/uploads/1/3/1/4/131406614/ee22cce4fb085.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/gonebani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446762/normal_5feeccbb5b3ce.pdfIn PDF document text
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/javumiditogeb-lurudunanote-tajevelo.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/vevo_video_mod_apk.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/getizar/hsk_3_standard_course_workbook_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/aldine_lms_app.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/bufopapufasax.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/hays_salary_guide_2018_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/kisakevatoz.pdfIn PDF document text
    • http://gaxomin.rf.gd/suzutumuwudesemakesixene.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_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 5212 bytes
SHA-256: f4cefa66384112037d8656920c5b072fe9481eea8a8dc83812d8a1dbd00334dc
font_01_sfnt_off00011480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11480 10780 bytes
SHA-256: f0a9c2f718216bcf49d500fbf6ac96c99287460cbc2b804f0bc45da08a2f7a37