Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a22120d78a3fd4d…

MALICIOUS

PDF

75.0 KB Created: 2021-02-20 11:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1868cb0e48a144d7557d6096e3b1ceb1 SHA-1: 21d4ac069a61f4644d78fcc7e917bcbb581f7260 SHA-256: 0a22120d78a3fd4d6406905f3325fe5cfd359a42543e7e6f4031e0a1cd9fb288
196 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
  • 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://seumenha.ru/aws?utm_term=hamlet+movie+1990+parents+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459036/normal_5fed2e6480637.pdfIn PDF document text
    • http://thecet.xyz/alien_shooter_2_conscription4mhec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_601a71747e5aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421478/normal_5fc842211f017.pdfIn PDF document text
    • https://wozepunelom.weebly.com/uploads/1/3/5/9/135993859/jobozo-forinam-kikilukefuge-bunoxolebilemos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414487/normal_5fd081299e669.pdfIn PDF document text
    • http://disconto50.info/76175867674tqnk1.pdfIn PDF document text
    • http://opit.space/ias_38_full_standard2p1z9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476152/normal_5ff82d882e281.pdfIn PDF document text
    • http://noverst.xyz/layer_poultry_production_manual928md.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401694/normal_5ffa7a7374ce1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_600a71a8379d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502833/normal_5fe1eae02dd34.pdfIn PDF document text
    • http://teasmall.space/free_business_plan_startup_templatenr14u.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/xuvamuba/97507600437.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_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 5652 bytes
SHA-256: edaf9361e43cc9ac9e6d8bb9e94f285a3c378a34dd1cb5f9adba8f743d121cf8
font_01_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 10620 bytes
SHA-256: 1d09a0d996b2667a0e95f7a7a37c43b28445a43e7dd8abacbdf4840322cb56a9