Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4cc3523f3d14c8b…

MALICIOUS

PDF

73.1 KB Created: 2021-02-11 15:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1095aedb130148d0cfcbd4841deac5ed SHA-1: b1f62116bce4fc8623b97fa40bc8f6730424b96a SHA-256: c4cc3523f3d14c8bdc4bbecd3449830684c6c386cbbb43551c45c0de91dcfc8e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wb?keyword=chori%20movie%20song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405430/normal_601467dd30d07.pdfIn PDF document text
    • https://fadapezak.weebly.com/uploads/1/3/0/7/130775088/3350576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501656/normal_5fe5ee9edd3ac.pdfIn PDF document text
    • http://onlinetiser.website/zenwise_digestive_enzymes_walmartpwl9r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_600c0a2fa0ff7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454820/normal_600601027b505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372383/normal_5fdf90e25bbef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_601ecaff544ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_600fc3b5594be.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/mikibetiv/leadership_concept_powerpoint_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/assert_java_android_example.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/6051839934.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/bubble_organizational_chart_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/adobe_reader_xi_offline_installer.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/baar_baar_ye_din_aaye_ringtone.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_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 4820 bytes
SHA-256: c6677faede5354d9045d78c3e4ab1c906a6e8235a8c231894e08b4ca32e6267c
font_01_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 11200 bytes
SHA-256: ac2a848099d7d97ab7848ef7cbf9c6e7819e40af40354b9ed628a1ec05fc79cf