Malicious PDF — malware analysis report

Static analysis result for SHA-256 1277c2023aeabda8…

MALICIOUS

PDF

68.3 KB Created: 2021-02-19 03:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b90b64ea46b65dcef6b7210168aa9595 SHA-1: 5f5b13fd3df285834091b06e9e9733911a95b2a4 SHA-256: 1277c2023aeabda8146ee6ba8eebf7668edb00220df30e7eb63e1e88b5a866cb
304 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://mapokelamoda.weebly.com/uploads/1/3/1/8/131856574/xumun_pajuj_ganaxu.pdf.
  • 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.
  • 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://yafferge.ru/wix?keyword=death+of+a+salesman+secret+quotes+about+money In PDF document text
    • https://static.s123-cdn-static.com/uploads/4473030/normal_5fcbc6458526e.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebegawiwa/hAjjgdb/face_changer_online_video.pdfIn PDF document text
    • http://reduslim-sito.site/goods_receipt_form_template9l8zi.pdfIn PDF document text
    • https://mapokelamoda.weebly.com/uploads/1/3/1/8/131856574/xumun_pajuj_ganaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvajuvewuj/ihgfHgk/zojilofufifen.pdfIn PDF document text
    • http://com-copyrighit.com/46903029480pyjow.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/sexubabu.pdfIn PDF document text
    • http://kemotunitajifap.iblogger.org/apowersoft_video_capture_portable.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/020nWvA/ragdoll_always_throwing_up.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/djefzif/mimepowemukawovexun.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/iiigOje/51237029219.pdfIn PDF document text
    • http://glawerry.online/franchise_hockey_manager_6_reviewfwzcv.pdfIn PDF document text
    • http://yildirimotobursa.com/vb._net_2017_full_version4nxfv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nigabosepa.epizy.com/negotiable_instruments_act_1981_in_hindi.pdfIn PDF document text
    • http://webidiwotew.epizy.com/gobododikufalidojubob.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_off0000cf85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF85 5488 bytes
SHA-256: e69a9b3a6e30a29a78fc7d3b10d6a28d62f7c63f016db9b8705b59d749610296
font_01_sfnt_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 10004 bytes
SHA-256: 7ff10549dce9139c748e12e391960a552f20479439b997e5d52fce82d45538d4