Malicious PDF — malware analysis report

Static analysis result for SHA-256 81017f5c69a09628…

MALICIOUS

PDF

66.8 KB Created: 2020-11-11 21:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f1b7198cb9b9390a52fdfc10d375bd4b SHA-1: 50861578a66a11c7fd9c2da1f83e0a0145735c8b SHA-256: 81017f5c69a0962852d1c850fdda74b6209afcec9bed89db7b362fffdd5937a2
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://cctraff.ru/aws?utm_term=marrakech+shopping+guide+blog In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5f9189280a172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407998/normal_5fa0e7f025cec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5fa23779b4d60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_5fa45dc70db8e.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/8af89563c3c02b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_5f97698ff14e4.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/2bb6e7bf-36c9-4a04-acef-cbdf0aac0746/nilowugofe.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/acknowledgement_of_receipt_hud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8151f9-f63f-4a65-8f8f-43f9e3674cb5/sekabetes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f771414-f552-4985-96d1-f6a92635d2c6/29843490160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2bfcd8-de7c-4418-87ea-c785e3b90c96/dantdm_playing_riddle_school_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a127b4-1cc8-4c98-b926-fd2cb5af659d/roxuj.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/tesis_de_administracion_hotelera.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/fajizifepap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75f01c0-da00-4f21-aab3-a9d702ae8dfe/zanog.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_off0000c8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F8 5544 bytes
SHA-256: 4f424327a0032b3c65cb4c1d050a69985ec7e8868f49e591409a1b304f337cff
font_01_sfnt_off0000dbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD1 10276 bytes
SHA-256: 00e861a82157d829963ccc4806a390b446341a6df56df4e67ef33b8b489067cf

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