Malicious PDF — malware analysis report

Static analysis result for SHA-256 3880c4e7216aeac4…

MALICIOUS

PDF

75.1 KB Created: 2021-01-10 02:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: baf04201cf8e6bf8e856a647ac0ccd32 SHA-1: be5bfbbc628b95b13e018fb2dc08a0e94321d139 SHA-256: 3880c4e7216aeac4d327590641fe4eadea1b7af0de4322c6367b7933bab39794
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/wb?keyword=college%20basketball%20coaches%20association In PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/jitafe_lusizuvafit_xaluziguwi_sinibobaposobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8f874819f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5fabc9d15768b.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/sweet_empire_mod_apk_unlimited.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474478/normal_5fc8aa446b560.pdfIn PDF document text
    • https://site-1180269.mozfiles.com/files/1180269/run_dmc_shooting.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495849/normal_5fddb4f42696c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f8f2f3bde08d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5fe1b1bb856f3.pdfIn PDF document text
    • https://site-1168049.mozfiles.com/files/1168049/nbc_sports_network_schedule_track_and_field.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413718/normal_5ff553cc65721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f8a76a4e3916.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/ddZoghm/icy_veins_wow_classic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_5fd0870a4258d.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/ieihbhb/99349657706.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_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 5072 bytes
SHA-256: b8731e246e2d731a8f7b88ca0eb47f9d90c7ac4dd6237ce7d079e26495b375af
font_01_sfnt_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 10620 bytes
SHA-256: aead5f87ced38fec76683f429658a07d094309c478808fa3d9e0ccf17faa707f

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