Malicious PDF — malware analysis report

Static analysis result for SHA-256 87584414fa4656ac…

MALICIOUS

PDF

72.7 KB Created: 2021-02-06 20:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 57227a64391306ef092cd62838594335 SHA-1: d839537ff3e29262590fc1b63a85c03db8db06c1 SHA-256: 87584414fa4656ac868db80ee11c7cac197d20d32640bc061ec13d5706b2e7bc
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wb?keyword=edx%20introduction%20to%20python%20answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fd2dfc539c23.pdfIn PDF document text
    • https://morexenuf.weebly.com/uploads/1/3/5/3/135311883/rufujiluparovexara.pdfIn PDF document text
    • https://lexenunisagofoj.weebly.com/uploads/1/3/2/6/132681921/4776612.pdfIn PDF document text
    • http://vejobazure.22web.org/nufixuxoxipupikiwoviwa.pdfIn PDF document text
    • https://mazogerivajusem.weebly.com/uploads/1/3/4/3/134341978/c070136994.pdfIn PDF document text
    • https://tamejozapana.weebly.com/uploads/1/3/2/8/132814544/nigubazuniwage_saduja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425916/normal_5ff90f08e0b2c.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/igdjdBo/74834630051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_60172101a67bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368768/normal_5ff5872f69326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386618/normal_5fe4d767e9c5e.pdfIn PDF document text
    • https://gopikuximodel.weebly.com/uploads/1/3/1/3/131384340/zatof-komafitomije-pisiruj-revetizip.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/XUidhn8/dungeon_craft_tiles.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388416/normal_5fe0042589aec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457330/normal_5fee666c2e10f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 5348 bytes
SHA-256: 1cf0da0ebed751cfee41a9c54c5632bdccc76cbd830fe048ee8177ab4d00b613
font_01_sfnt_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 11020 bytes
SHA-256: ef441f8572edd1d97ac72e2945ca6eb887ac0c639a945f4b876f50951f7d6281

Open this report in the interactive analyzer, or submit your own file for analysis.