Malicious PDF — malware analysis report

Static analysis result for SHA-256 e881d06860b178e8…

MALICIOUS

PDF

72.1 KB Created: 2021-02-25 13:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d0a5350b66771030dc66c84053855e3b SHA-1: a1438cec4f6f0ccfc946d9c12bd0d59483021d89 SHA-256: e881d06860b178e8af8f1a051ca82b889ebbc433da97e47edbdd2a2ef5c0520a
196 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/award?keyword=mary+poppins+song+lyrics+chim+chimney PDF link annotation
    • https://cdn.sqhk.co/ranetixeba/ja3r1Uj/.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/8Yghxjj/contour_plus_meter_kit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481424/normal_600b6fa5706af.pdfIn PDF document text
    • https://mutokanapagoz.weebly.com/uploads/1/3/1/6/131606569/4b00f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423752/normal_5fd91574951c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477376/normal_600557a2197e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_5fe786f2214cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505363/normal_5feefefcccbef.pdfIn PDF document text
    • https://cdn.sqhk.co/ximirujusuxo/ggTn0p9/39723378731.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/fgidIFG/memes_stickers_para_whatsapp_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_602aedb179a80.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/jj1jfjf/71397717434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mokineso.epizy.com/animal_crossing_new_leaf_shampoodle_hairstyle_guide.pdfIn PDF document text
    • http://rurufasejevexen.epizy.com/bulipigimizezatap.pdfIn PDF document text
    • http://fegifujeviba.epizy.com/boundaries_book_study_guide.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_off0000d9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E2 5456 bytes
SHA-256: b6e2fe8c4d209f987f058a8e4306cbb4d912bbe357fdf3d64b7cceba8a1e1ddc
font_01_sfnt_off0000ec5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 11996 bytes
SHA-256: 357367ce4089cad8a9df3425c948889d8e296b40f884acaf6e65a8e2ca67b993