Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60aae54336a2fa7…

MALICIOUS

PDF

77.9 KB Created: 2021-01-25 16:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4a092d77a4c8ec4f8fe406f16879d0c0 SHA-1: 6dcea8a48d892db02bb70645c941066b1585f092 SHA-256: b60aae54336a2fa7b7394d44615c78a6ee67b75d7585829cc080668d1e948554
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://druttle.ru/wb?keyword=arduino%20simulator%20win10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468534/normal_5fd28c6a08b7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448330/normal_5fec09c718170.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fc7c3382972f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468831/normal_600be539d6bdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_5ff714c2e5e6c.pdfIn PDF document text
    • https://ledapenilodaro.weebly.com/uploads/1/3/1/0/131070651/d8096.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5ff6376da3e32.pdfIn PDF document text
    • https://zesijijonade.weebly.com/uploads/1/3/0/7/130776416/307b85a84f8.pdfIn PDF document text
    • https://lorivomewojesab.weebly.com/uploads/1/3/0/8/130813497/tagefuba.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/perurulexi/indeterminate_forms_worksheet.pdfIn PDF document text
    • http://vifewupanog.epizy.com/zoxireropajewetaga.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/whatsapp_gb_terbaru_agustus_2019.pdfIn PDF document text
    • http://fujukosis.epizy.com/guided_elk_hunts_in_chama_new_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/desikoditewuvalozesepuvun.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/43191309653.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_off0000f3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C8 5244 bytes
SHA-256: 1134e43d5a4e9dd72511d3463245c67ec6aaa88d92342b2415ee776e81466366
font_01_sfnt_off00010596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10596 11056 bytes
SHA-256: 2328909b8724719b269493f0cfe481b4f0737dfc53d83b84091d9fc56ed85fec