Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7828557b3abe85…

MALICIOUS

PDF

77.4 KB Created: 2021-02-06 06:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3fa3cd1480cc994e52be7c505ec20e90 SHA-1: 4c37df1770f3b5acd03c741fae6169d48850ac0e SHA-256: fb7828557b3abe850c011f0ee96d3bddce9f68597f867cfc8191217cb2fac25d
244 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
  • 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.
  • 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://crophysi.ru/wb?keyword=barcelona%20players%20formation%202019 In PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/64a54.pdfIn PDF document text
    • https://nekamefirojes.weebly.com/uploads/1/3/0/7/130739169/tumajojib.pdfIn PDF document text
    • http://muzumekowasisig.iblogger.org/xilokazule.pdfIn PDF document text
    • http://zakedifive.iblogger.org/css_grid-_template-_rows_auto-_fill.pdfIn PDF document text
    • https://zofawuzi.weebly.com/uploads/1/3/5/3/135323082/zojuvi_vinedar_lejux.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/VPtT2n0/adamantite_armor_terraria.pdfIn PDF document text
    • https://vipigenomunopem.weebly.com/uploads/1/3/1/3/131398348/4996587.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/agdejib/41904002357.pdfIn PDF document text
    • http://serviceforyou.site/free_digital_marketing_strategy_template_2019lfmxb.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/c5WthiG/stickman_warriors_fight_mod_apk.pdfIn PDF document text
    • https://pajixuga.weebly.com/uploads/1/3/2/3/132303126/213278.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/pizolajavomit-fejurojepobuk-rafeselul-xuvuzokuga.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/e7f28c60d14.pdfIn PDF document text
    • http://mainsale.pro/22661032770qthg6.pdfIn PDF document text
    • http://basiditdcf.space/41859176168t26al.pdfIn PDF document text
    • https://mavoxigomag.weebly.com/uploads/1/3/4/0/134096713/7578406.pdfIn PDF document text
    • https://pokifinib.weebly.com/uploads/1/3/4/0/134017941/medaxiweworoki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tefolinum.epizy.com/2683554040.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_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 5792 bytes
SHA-256: 89172a5b580ba384a199f8bb9a6ae8ad48637047b11807b4de99605d37f9a4bb
font_01_sfnt_off00010420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10420 10736 bytes
SHA-256: 2af60bf2f3e6af379d75b84eaf03a96f08146b9e03e3e8f0fb1bd38a5a8d1968

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