Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff44634d6de04aa…

MALICIOUS

PDF

63.5 KB Created: 2021-01-25 23:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1840012fafaa52c0324274392151b2e5 SHA-1: 76262e74e0174842c27ae32f1c9d9a87e3ba2533 SHA-256: bff44634d6de04aa932c858f021631b2d1a633a65063fbf6823bb8ea547231b9
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/123?utm_term=chi+square+worksheet In PDF document text
    • https://nesamakamaxo.weebly.com/uploads/1/3/1/6/131636712/4347026.pdfIn PDF document text
    • https://lisomoduxu.weebly.com/uploads/1/3/1/3/131383329/sajosasir_guvafafupovoru.pdfIn PDF document text
    • https://zuverikaniwofu.weebly.com/uploads/1/3/4/1/134108987/banejer_wabapoda.pdfIn PDF document text
    • https://vejazisiji.weebly.com/uploads/1/3/0/9/130969480/sagij.pdfIn PDF document text
    • https://tonuvufew.weebly.com/uploads/1/3/1/4/131438708/nogavowuse.pdfIn PDF document text
    • https://tejalegevususo.weebly.com/uploads/1/3/1/6/131637178/jatupo.pdfIn PDF document text
    • http://maslovauto.ru/change_notification_tones_androidf9fkq.pdfIn PDF document text
    • https://xovixonu.weebly.com/uploads/1/3/4/8/134896571/sasapivasazavuped.pdfIn PDF document text
    • https://gepogixuzusesil.weebly.com/uploads/1/3/3/9/133999736/2433793.pdfIn PDF document text
    • http://byt-upak.ru/92093709715s5g76.pdfIn PDF document text
    • https://zitolibozix.weebly.com/uploads/1/3/4/0/134040523/pagiz.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/potofaw/gb_whatsapp_themes_free_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/budget_2019_analysis_report.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/batla_house_video_song_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/creative_suite_cs6_mac.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_off0000bcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD2 4928 bytes
SHA-256: 5e5eff4fb9503e16d5080d6c1593f7670509492a4da89c5552dea29a0815f1c5
font_01_sfnt_off0000cda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA1 10604 bytes
SHA-256: 21bc67b7b9aeda8815e20b8bc54da0b18a231b506159a3059687f56fd6e636f7

Open this report in the interactive analyzer, or submit your own file for analysis.