Malicious PDF — malware analysis report

Static analysis result for SHA-256 5832fdbbb53b7aa3…

MALICIOUS

PDF

34.6 KB Created: 2020-10-10 17:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 996585ae64040b4c4030f43afd98c40d SHA-1: a85809c07c6edf4d55defa2b4eb64c74ed708ea4 SHA-256: 5832fdbbb53b7aa3c2c6eef9887e64ccc80d4a8c68ff81436aed6febddf6bfba
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://ttraff.link/pify?keyword=el+ser+uno+libro+4+pdf In PDF document text
    • https://site-1041926.mozfiles.com/files/1041926/91508944119.pdfIn PDF document text
    • https://site-1039316.mozfiles.com/files/1039316/pesuzafudadumana.pdfIn PDF document text
    • https://site-1039000.mozfiles.com/files/1039000/mugifivupasomemuvarimuvim.pdfIn PDF document text
    • https://site-1039514.mozfiles.com/files/1039514/10445021197.pdfIn PDF document text
    • https://site-1039266.mozfiles.com/files/1039266/38598371178.pdfIn PDF document text
    • https://site-1039351.mozfiles.com/files/1039351/54454106022.pdfIn PDF document text
    • http://files.twobrotherstransportation.com/uploads/1/3/0/7/130739769/wakobamakol-dobomivawesade-wikeninomititok.pdfIn PDF document text
    • http://files.clarksburglibraryfriends.org/uploads/1/3/1/1/131163876/b8a5a00a8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1384/8219/files/18957560513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0469/0069/files/love_you_like_im_gonna_lose_you_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0514/3971/files/servidores_de_minecraft_1.8_no_premium_eggwars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8233/7444/files/hr_connect_forest_service_dashboard.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_off00004546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4546 5012 bytes
SHA-256: b3dbba6e800ff70c31aa5f2775db34b400afa1adbdd9b2927dd22aa08d980e35
font_01_sfnt_off00005657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5657 11968 bytes
SHA-256: 171a6481c310b5265ef1a02236ec9ef9b2393b34266e54f8ca078bff3408dd24