Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb94b04adaff71e5…

MALICIOUS

PDF

63.8 KB Created: 2021-02-26 13:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6939bd1ba316b2078a4adaf8322e99ef SHA-1: ac8bd13699def4b798eecb23efe595bf832f5a71 SHA-256: bb94b04adaff71e5b21e37a1be8a3fc74a0c6e4d335858f608f92d25d3ba97c3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=how+to+dye+hair+with+la+riche+directions PDF link annotation
    • https://xuxurebero.weebly.com/uploads/1/3/4/6/134673100/9ed2784a5e10f7.pdfIn PDF document text
    • http://fevajubinijexaz.iblogger.org/kenmore_gas_stove_manual.pdfIn PDF document text
    • http://max-lifting.store/859269088748fyze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457296/normal_5fe119af4c530.pdfIn PDF document text
    • http://scriptbook.xyz/losugujotazepulutajinz0p5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371261/normal_5fe34a0a94d4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375884/normal_6005e4909663d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412902/normal_5fed5808793e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rumudojipa.epizy.com/does_the_quran_forbid_alcohol.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/19306063821.pdfIn PDF document text
    • http://selifesupenikiv.epizy.com/jutepefi.pdfIn PDF document text
    • http://kedokonox.rf.gd/android_manifest_network-_security-_config.pdfIn PDF document text
    • http://fogepejil.epizy.com/25789838346.pdfIn PDF document text
    • http://woxariwete.rf.gd/combinator_factorio_guide.pdfIn PDF document text
    • http://livirava.atwebpages.com/69124661364.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_off0000c01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC01D 5180 bytes
SHA-256: 656513abca35bceafc0eb2efffa60b5335158fa3c8203005c6c81f6a9a6adfa5
font_01_sfnt_off0000d1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C6 9428 bytes
SHA-256: 0d3f66b035696ff3610415348a24335cfe411de2578a9b25f9c4acd003ed01c4