Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86cffc5bcbf84b3…

MALICIOUS

PDF

64.4 KB Created: 2021-02-15 22:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 921b6603aa0f1a545fb9a7ef11534eea SHA-1: 0748d4b11b19da303710c09bcc0475573282969f SHA-256: d86cffc5bcbf84b39d0fc3dfccc41a53578c8e5ccaef19bb652c9cc35e57d0f3
186 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.
  • 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://jacksth.ru/wix?keyword=concept+covered+chemical+energy+and+atp+answer+key PDF link annotation
    • https://nelajelax.weebly.com/uploads/1/3/2/7/132712676/3036693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_602876d40c501.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/ghXGbjc/lynx_vs_bobcat_tracks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381730/normal_5fffd2ff1cb07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_6019c8266f1d9.pdfIn PDF document text
    • http://monongzhlh.space/divirobijuvxi1r.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/jhLhejc/divefisevikijaguwimiri.pdfIn PDF document text
    • https://wunabigoji.weebly.com/uploads/1/3/4/8/134891590/d2fc87d4ff6129f.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/ijc6iRQ/sure_universal_tv_remote_control_apk.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/is_there_a_voice_recorder_on_iphone_10tbie9.pdfIn PDF document text
    • http://wordsideget.top/persepolis_book_free_onlinersj9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_5fdcb18a9f174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5fd2e7dc13c03.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/5q9iija/classic_piano_house_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000becb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBECB 5708 bytes
SHA-256: 6c030bb14a93b8f7709713fe9bd3106e1ba3f64cca3a6aadc8d816d5609b3dd6
font_01_sfnt_off0000d221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD221 9864 bytes
SHA-256: 1ab3136b1c0dc4b2450110f879c5fba0dbf1da0b75db41904adba539942f75ac