Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00f9eb53b2a7445…

MALICIOUS

PDF

76.5 KB Created: 2021-01-03 18:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 4f07dd00b29d7a8ce44606886f3aea81 SHA-1: 6c95b4b7eed95801cb1503d9e70e4c4fdc821533 SHA-256: a00f9eb53b2a74453eeaf11c89cc6c4bce82f97bbdf48979cdf7dbb5082443ea
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=cinema+box+apk+not+working In PDF document text
    • https://tinozewadewuxa.weebly.com/uploads/1/3/1/3/131398338/aac523295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5fc77b66ea2a8.pdfIn PDF document text
    • https://toxovapuwelubu.weebly.com/uploads/1/3/4/7/134733969/kifunu.pdfIn PDF document text
    • https://sezemizom.weebly.com/uploads/1/3/4/6/134622585/5357613.pdfIn PDF document text
    • https://nekamefirojes.weebly.com/uploads/1/3/0/7/130739169/454058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474989/normal_5fb813e9db4d6.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/1744206.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22dd0d7-fca0-4734-ab6e-15a937a40f3d/17675296201.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/verb_to_be_worksheet_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d546ef8-d7a3-46a8-9ad2-31bb3d6e58cd/wumiludixazoxebixutejonen.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/zevebevixul.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/physics_textbook_class_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76e1edb-0119-43ed-93f6-4f6046cde9a4/harvest_cookware_pressure_pro_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/tasadesuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/14231854619.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_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 5200 bytes
SHA-256: e59b1f15e1e728cf21da65092bfd78c947e34a8c0e4a82408500ce4ffdda752b
font_01_sfnt_off00010159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 10536 bytes
SHA-256: f1f3990f49176d7e2cf6c69ae1278c02a27be69a29dc63dfb8b1a5f3bdfc4879