Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38792b4df5b1d35…

MALICIOUS

PDF

49.4 KB Created: 2020-10-16 01:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9ab8a46869b8448905bebeb12e87247c SHA-1: df1695e31a2f7fbbfbfbe28305bdab21864db234 SHA-256: f38792b4df5b1d3541fdb8397dfe90c129dcbe7facce0d629819a32f2c65d059
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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://ggtraff.ru/123?keyword=topside+roast+beef+cooking+instructions In PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/69005809392.pdfIn PDF document text
    • https://site-1048521.mozfiles.com/files/1048521/vakifasalizo.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/gixevixofajifap-fimiwipinanoxat.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/fuxiwikakewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f87f5b074604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f88c413d6f91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f88b9cd49ff3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/caa3d04e-c2d0-47b4-ab05-87a71d81bd00/78780868463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72399b4a-d8d4-4541-9761-68f4b5020eba/62048216644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49355f6-0d74-49bd-ab3d-826c9b8ff0a6/37819980833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b0546d6-d8cd-4ef8-b2cd-30923c96be99/gizepinurudubex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d81e65c-f68c-40df-8a13-9737179108e0/zinagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5844666-363f-4148-90f2-f495b32b1843/12131878182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7db2153-5866-467d-a70e-2b12bdf69dd0/mutimazufedexilenofugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bef0f06-39b6-4951-b55f-f822c4b7bda8/befawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc3ca4e-679f-45c2-86cd-deec092e6a9e/33273838369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2156f66-d481-41af-8ed1-e7b0308081e0/kunovufino.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 5324 bytes
SHA-256: 87721ffee9d65c8dcdfcdbd87a288a6ec9aebb58c1af1b19e55d520dad31c2df
font_01_sfnt_off0000873a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873A 10192 bytes
SHA-256: c3fcd156072b87d8c81b519e38c71da7c6100f79de9d922a11c32949847ad9d8
font_02_sfnt_off0000aa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA11 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2