Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df4acff57c98b3d…

MALICIOUS

PDF

75.4 KB Created: 2021-01-20 12:49:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 591364d4171ff00bb5699243e6146e45 SHA-1: f40deed8df9eb4cdd941c47c6e53286ebcc870a4 SHA-256: 9df4acff57c98b3d0c23164d4260e6fcdcc9bb5021f2f66910311ca9b95bf692
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=amazon%20prime%20video%20subscription%20price In PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/idea_mobile_recharge_offers_online.pdfIn PDF document text
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/7460499.pdfIn PDF document text
    • https://site-1176306.mozfiles.com/files/1176306/93479098163.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/XQtjaba/perfect_world_mobile_apk_mod.pdfIn PDF document text
    • https://site-1167972.mozfiles.com/files/1167972/kebikivakefugetul.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/3d0b2374.pdfIn PDF document text
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/d1c47e605c981fb.pdfIn PDF document text
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/7b9cfb363.pdfIn PDF document text
    • https://site-1168194.mozfiles.com/files/1168194/customer_service_email_templates_follow_up.pdfIn PDF document text
    • https://dutilugamon.weebly.com/uploads/1/3/5/3/135301630/xogalorotunebapoju.pdfIn PDF document text
    • https://mafaredoli.weebly.com/uploads/1/3/2/6/132695491/zofowijavivofik.pdfIn PDF document text
    • https://site-1217191.mozfiles.com/files/1217191/damaselonawewe.pdfIn PDF document text
    • https://site-1167931.mozfiles.com/files/1167931/83399167379.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/1827046.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/zazelujeju/bollywood_new_movies_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/braumeister_50_plus_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/47126477058.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/bhojpuri_song_2019_mp4.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_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 5428 bytes
SHA-256: 10b3f685b932edebc0f332234cc4bc351560864ddb0e89dff17cb7b4ae71a6d4
font_01_sfnt_off0000fcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBC 10492 bytes
SHA-256: 7c5610e2d4fca2f3e7490654ff632f804a8af3b5d2e949a2592f7ca2c9865562