Malicious PDF — malware analysis report

Static analysis result for SHA-256 f919a8df09ef2cce…

MALICIOUS

PDF

46.5 KB Created: 2020-10-14 08:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1a0675b643bc0eec45ff65733fbc1b46 SHA-1: 410495e0f774082883672fead9fd7775079e03d2 SHA-256: f919a8df09ef2ccef8b65528201dd9fb90145dfd5c9d5a8878bf6312f1afafc2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/strik?keyword=vampire+d%2526d+5e+monster+manual In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vigirupiruwovilav.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/3409757.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/bupemigimamuvap.pdfIn PDF document text
    • https://site-1037866.mozfiles.com/files/1037866/juxuj.pdfIn PDF document text
    • https://site-1036881.mozfiles.com/files/1036881/25542945804.pdfIn PDF document text
    • https://site-1037227.mozfiles.com/files/1037227/wesuluwosodirixinadasika.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/2a01b0e4-f74d-4274-9dde-27183d6ae343/65166453123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88aed32-ffad-4cda-9780-5b73b05d44a4/34359025950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/810492bf-0d2f-4426-94c9-6e89d7de43ef/buwidenodatil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edff701a-79e1-467f-81c9-40df8424de51/kepefiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6986bf4-c90f-41c8-915d-44f548d4cb89/sekitufalemoko.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_off000079a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A1 4860 bytes
SHA-256: bdb71db6459ce66bfc48755640fdd4afee9f3e75ea9bed0926104f9ac007a229
font_01_sfnt_off00008a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A10 10420 bytes
SHA-256: 1bb29f7aa1277111c5d1c0a89d0e39019bb1a0610d3dc6cd0b8934f176ecdf42

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