Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b8170f0e8262ff…

MALICIOUS

PDF

82.3 KB Created: 2022-04-16 03:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: cb06701666ba9d7e2f6952ab404b0582 SHA-1: fbcd13d7771d0d84f44a652040073a95c7d175e8 SHA-256: a8b8170f0e8262ffcdd74251425c3e99ef65ba03cd72edd3c76100f1bf57ac2d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lazav.co.za/YmrXLWy8?keyword=easy%20smoothie%20recipes%20without%20yogurt PDF link annotation
    • https://watilokid.weebly.com/uploads/1/3/1/8/131856522/bisofizulovotu.pdfIn PDF document text
    • https://kuduvoga.weebly.com/uploads/1/3/4/7/134745106/sowoselakuz_murive.pdfIn PDF document text
    • http://kungfubp.hu/admin/assets/images/files/nijame.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/25105056923.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/162398db0e7408---60511149707.pdfIn PDF document text
    • https://zejinimab.weebly.com/uploads/1/3/1/8/131856072/zilabobegaz_nipavoxun_lusaworasa.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/78566912713.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/162526244a6f4d---winedanadaxodojaxutog.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/2587980.pdfIn PDF document text
    • http://akvarium-olbrecht.cz/upload/file/miwuzatuwusototatasa.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/rugunade.pdfIn PDF document text
    • https://soferivajateru.weebly.com/uploads/1/3/4/6/134650686/989864.pdfIn PDF document text
    • http://mastervin.ru/files/file/xekaderekizogugukopixinit.pdfIn PDF document text
    • https://pikofejuja.weebly.com/uploads/1/3/4/4/134478885/levasaw.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/71002734708.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/26376893638.pdfIn PDF document text
    • https://padixegidenu.weebly.com/uploads/1/3/1/1/131164435/6456296.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/tavijidefifipaliliwojega.pdfIn PDF document text
    • http://yoyaku.com/app/webroot/js/kcfinder/upload/files/72445498650.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/posilonedizulifibus.pdfIn PDF document text
    • http://zxsolar.com/d/files/77998197502.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000c435.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c435.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC435 17820 bytes
SHA-256: e37853d2fc35dc6fdb10d5265d96146c8d52f24ae54389e99f05355343da5507
font_01_sfnt_off0000f35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35B 10956 bytes
SHA-256: dbd5f15ada4e441e9825acc95b82c6b10d404178750b979f6c43814b97da21bd
font_02_sfnt_off00010ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000124f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F7 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae