Malicious PDF — malware analysis report

Static analysis result for SHA-256 154ca56887c812c9…

MALICIOUS

PDF

70.1 KB Created: 2021-02-24 18:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 892eac7ecae11013d0a288eb329cfe55 SHA-1: b39b32f36aab441b2e5759bd997e67de442618ec SHA-256: 154ca56887c812c91053c37b485328e44e43915a19ac9192b63bc9a673cf4e48
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://baarspo.ru/wix?keyword=bose+wave+radio+cd+player+service+manual PDF link annotation
    • https://gowumobajakexe.weebly.com/uploads/1/3/4/5/134585768/tarujufekej-turepumajijave-wuriga-gikavoxorijoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_60176d0c89c69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fd9d6b2ae188.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/wutaw-kizulas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379606/normal_5fcd2df32bd2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422372/normal_5feb9fcc2a54d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475588/normal_5fcaf42fae0a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402488/normal_5ff69ee99a39c.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/WOD0hhg/7883927944.pdfIn PDF document text
    • https://vopifubuk.weebly.com/uploads/1/3/1/6/131636719/xakabavo-vilowubotukuju-kapubageki-zamelosebivefib.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/gogoxowiniza/kindergarten_worksheets_identifying_letters.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_off0000d6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BD 5520 bytes
SHA-256: ef621d76d9e93526963535af963b5c16fee37f3c4dd91724b03602470d3ddb39
font_01_sfnt_off0000e992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE992 10032 bytes
SHA-256: 01bdd96afdc16a6254755380a8c20dbfe64e2d8d814c366a22cf57a713c26a9d