Malicious PDF — malware analysis report

Static analysis result for SHA-256 718ab1464b917b67…

MALICIOUS

PDF

70.2 KB Created: 2021-02-17 23:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c7a8ea2e2462d954236eb2f43914145b SHA-1: 88ca1a56d5ac147dbbce0c39b27b9ddfdf8f2cfb SHA-256: 718ab1464b917b67b617a76aab87e93b1c5709591055c39659b88783b714546b
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/perafosorivom.pdf.
  • 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/wix?keyword=gwx+5600+manual PDF link annotation
    • https://cdn.sqhk.co/jakufomego/ih6ifij/pukiwor.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/perafosorivom.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/jfMnmhd/flappy_crush_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/viajgjh/bird_papa_bubble_crush.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/gqhchfo/browser_button_css.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_5fd61158b467d.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/busifovuzaki.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/jiajeig/furious_car_racing_hack._com._gam._vip._gamer.pdfIn PDF document text
    • http://sukujemegamog.22web.org/jilunuvitiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475571/normal_601baa2747a19.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/igfqlhe/invasion_modern_empire_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najaxobefirag.epizy.com/el_alcoholismo_es_hereditario.pdfIn PDF document text
    • http://moniladipawi.epizy.com/lifeboatman_study_guide.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_off0000d769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD769 5168 bytes
SHA-256: bdc5bbf71125eb14d8bef9a7f60bfd29a827dc2b49f81a0aaf96cdeb335b2dc4
font_01_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 10216 bytes
SHA-256: c7867efd4625cf578c3ad35327bf2f21a3f8aa40a909ed47e2a47963ba791ca4

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