Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb41584983b6c41f…

MALICIOUS

PDF

66.6 KB Created: 2020-11-19 08:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e466f84f872b28ca5a1c1f028cbfc5cc SHA-1: 100bbc980c06e67adb2d5682ee4fcb13f1e09195 SHA-256: cb41584983b6c41fa70754965875c7af764504833b3a3e95a79b4d38c74e0cd3
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/123?utm_term=logitech+wireless+keyboard+install In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/juxita-ranuzeva-kover-joteru.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/439493.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/puwafewisuxukapo.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/9635404.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/a70e4cfe-3d27-4ce2-9a60-ed5a10cce007/94708822667.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/letisaxigiwevatokened.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7c6f10-8ae2-4869-a476-578d2fe5fe99/30281894666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f226521-4b28-4235-bf73-94bbc1b46d64/nemanufuvudurumasibuposo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41cfd45-1a40-49ab-bf3a-584dfb75d9fc/73993288892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8279338b-210e-4abe-af51-dfa19d17807c/20304275199.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/35173718551.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/fiwofonunobirorotad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb03b939-6af9-4651-a6c2-20109b1698b7/konubajekewudefoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5831c154-00d9-4bcb-bbb5-9d5c9a66f7d3/mua_giy_siu_m_gi__u.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AC 5540 bytes
SHA-256: 841c4c0bba0260f9ccb87c4bc49d83e57a35ab16855bb6c4879913a2f1192365
font_01_sfnt_off0000d99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 10612 bytes
SHA-256: 54ab9e5b1593a247ba7c5b9c66cc0b83aa8c2ad7de682ad517eb325824ad089d

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