Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ac5d6f6936a051…

MALICIOUS

PDF

72.8 KB Created: 2021-01-25 01:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b70032e9bc5b0b1502dd2591c5368ddd SHA-1: fd425ea2e4a792ca5c52f46b0e05462ebb239a34 SHA-256: 05ac5d6f6936a0513763bb972700911f36d503dd0603a6fd9f8af952c7ac1f63
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://baarspo.ru/wb?keyword=capsule%20wardrobe%20examples%20summer%202019 PDF link annotation
    • https://cdn.sqhk.co/tefupudoma/yijibg5/12242978243.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/Ggfchau/tunisadonerufutegurosej.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/hdEjagW/smash_2020_tier_list.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/3Xjcjh6/jotaxoruxidemopid.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/Oggjiha/18363911455.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/LBjbihf/50836911575.pdfIn PDF document text
    • https://poxemitiwafu.weebly.com/uploads/1/3/1/8/131871555/werezimenowonen.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/cgfhahf/97265319791.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/ibidoif/texas_tractor_pull_2020_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/pipujevi/idDGIDq/nodeziwafevepemisosinezog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484375/normal_5ff456f9a8d5c.pdfIn PDF document text
    • https://cdn.sqhk.co/mukutosi/kij4nom/88948539280.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/gkjjgcN/xilufolaxe.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/gidibesuxi/kuzed.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/78915609379.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_off0000de25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE25 5792 bytes
SHA-256: 08fd06a53ba1ad33daa577d25df928afa293cb0dfb6550f66d8c902ca221e326
font_01_sfnt_off0000f1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 10896 bytes
SHA-256: 2926a56a2687e943d53af69d3997e882f9df5334c8c5e2d862444125c5af6dc0