Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4f016e928e32a3…

MALICIOUS

PDF

58.4 KB Created: 2020-10-03 11:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: dcdaca39e62716ebd3f9ff56ad68a62e SHA-1: 0e0c1d12ddd0497699eb40a30569cf81eef81e70 SHA-256: 9d4f016e928e32a3ffb9c7f4c22ad238be6116e26a3d9d5a565d6a7a82fedb6e
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://ggtraff.ru/strik?keyword=sigmoid+function+numpy In PDF document text
    • http://files.astermaintenance.com/uploads/1/3/0/7/130739549/pujekiro_jukim_tuzusepam_fexosi.pdfIn PDF document text
    • http://files.nestedphoto.com/uploads/1/3/2/3/132303359/65528.pdfIn PDF document text
    • http://files.tafffurniturestore.com/uploads/1/3/2/8/132815004/227989040e.pdfIn PDF document text
    • http://riniwej.jackandjillraleigh.org/uploads/1/3/0/8/130874002/zumemajodepat-suxiwu.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/9532971b-35ab-4e15-b836-410a15e8bb69/vuguzibilafasipikonuwezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4d8345-9007-454c-bef8-236d36822fb9/wipamesowosasukuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/778d3d5d-c358-4771-9b9e-06faa120120f/tifoxelajima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77bffb6-d193-462c-8985-8df12f30cac6/18454837035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cceff95b-4b65-47a8-b883-43560064aa9d/15833495579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb91e25b-84c7-4d44-bb12-831b9718e920/2926307077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c09ccb-6412-417f-9205-df09d36fe196/tejemakudomowos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce98fe1-d512-4f2b-b648-3a4c9dfdb853/71552315513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5365c5d-ffa8-45b3-97b4-61da42557fc1/kezajekajam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8330c73d-a4c4-4e6a-bf5f-1d8a2cd45cdb/5568519517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3578/9982/files/xejobega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3650/6272/files/biology_final_exam_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8354/9860/files/falubiru.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 2

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_off00009619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9619 5164 bytes
SHA-256: 735f297242b7c8235c2c083d96e8f08c5c594bc0327b8ca21f31f90ee4c3e0a6
font_01_sfnt_off0000a7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B5 16980 bytes
SHA-256: 35e4abf2287a267721b56b37e5f8681541d256a08f5394960075213ad44b5581

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