Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b81887cfcc6122d…

MALICIOUS

PDF

67.6 KB Created: 2021-02-21 04:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7fd98b62e28e24b98f833df2d923610a SHA-1: 3fa0d7171d6869785806df5db7991b33fef12749 SHA-256: 0b81887cfcc6122d870fa460fbbf8317befa551574350ce5d2afb2c457d181eb
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://yafferge.ru/wix?keyword=100+years+calendar In PDF document text
    • https://nezuzubes.weebly.com/uploads/1/3/5/3/135327702/ponexebepotomebexoto.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/ringtone_download_app_namej600z.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/7550410.pdfIn PDF document text
    • http://dk-inc.xyz/7914421458575tnz.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/Fmkjc5m/boladuladufudoguwosutepej.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/ejajhig/football_champions_league_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/cjdgcgh/59572638219.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/rbklVgf/taxizomexepatimidokipifow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389080/normal_5fc9c3a106c3c.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/a6sidjh/domyos_intense_run_treadmill_reviews.pdfIn PDF document text
    • http://j3vnci4.xyz/electrical_network_topologyt6otx.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/JVhhjel/worudipanizufebojejeboka.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/iwQhbid/zombie_adventure_games.pdfIn PDF document text
    • http://onlineeshop24.xyz/pepawudikedekatsa7jx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_600f816fc83d6.pdfIn PDF document text
    • http://yesnutural.space/the_soul_of_an_octopus_chapter_6_summarycdm62.pdfIn PDF document text
    • https://rijopadanag.weebly.com/uploads/1/3/1/0/131070137/7156568.pdfIn PDF document text
    • http://emmetrix.net/annabelle_2014_tamil_dubbed_full_movieymrus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_6024083f9c4e9.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/Zy4ePhc/donoxidarezenoruxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_601468d5251d4.pdfIn PDF document text
    • https://fidedelab.weebly.com/uploads/1/3/4/0/134096197/dulideb_gopezipifa_duvobikutugix.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_off0000cda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA4 5136 bytes
SHA-256: ab50906cf4f7d2a5159bd0ce3a5a3ae21c74c7628735bfee2f11022866e41785
font_01_sfnt_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 9992 bytes
SHA-256: bef8a65aaf0e5d501e5c5f88624a97c6568ffbd98d0402d9645264ff1681eba9