Malicious PDF — malware analysis report

Static analysis result for SHA-256 2298aa74c36a6a03…

MALICIOUS

PDF

68.8 KB Created: 2021-01-27 06:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 0599d1a9ea2febc09d36a8687bf08588 SHA-1: 9377eb63bc51ab4a07d5069bacffe6b45eb06564 SHA-256: 2298aa74c36a6a039cba64ec94cb3581b94db7237970d77f54b45491e08c2ba8
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/123?utm_term=community+recycling+center+scarborough In PDF document text
    • https://static.s123-cdn-static.com/uploads/4482020/normal_5ff03f6752bf2.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/Boigsic/easily_influenced_thesaurus.pdfIn PDF document text
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/7902082.pdfIn PDF document text
    • http://idealica-columbia.site/warhammer_quest_silver_tower_hero_cardsux3zf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456667/normal_6005d72baee54.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/4833875.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/0twHhaN/lajumidozakewopiniziv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5fd5fb6c89a7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380083/normal_5fcc0e6a3244f.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/jbdibib/tuzuze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490920/normal_5ff75b397167e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462339/normal_5fd34a115ca37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459177/normal_6001f7db43e5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/jurosexaw.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/bezajarekiwo.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_off0000d18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18C 5360 bytes
SHA-256: 133c0285fe27ec331de9f20c9e8e438295353c2a69063330c7cf7736afac9ec8
font_01_sfnt_off0000e3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 10192 bytes
SHA-256: 950ab654a38a440215935af42a4e6416d072b0b24ba5f231295df94e60fa86b4