Malicious PDF — malware analysis report

Static analysis result for SHA-256 0817471c5c31f0e9…

MALICIOUS

PDF

83.9 KB Created: 2021-02-27 02:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8b0167f99a10f6453bd9291455eda6ae SHA-1: 8afdc39297b37b4f3eeae9432b1a588710a03da1 SHA-256: 0817471c5c31f0e9df6d1bee0ddb71715a9c0202fd204f69a03161d34d223d5f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure strongly suggest it's designed to redirect users to potentially harmful content or phishing sites.

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://botokaw.ru/aws?utm_term=american+born+chinese+ending+explained PDF link annotation
    • https://cdn.sqhk.co/limiwebu/g7p0Dbh/dovibumuvolasofejawoku.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/gdhjR3e/dead_town_zombie_survival_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/diitgix/32433163944.pdfIn PDF document text
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/wupomonirofumizurubo.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/hfUDiaw/scarlett_mysteries_cursed_child_xbox_one.pdfIn PDF document text
    • https://fibixexofebub.weebly.com/uploads/1/3/0/7/130738715/famadi_xepaxuralaganas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379359/normal_5fcc673a5eafc.pdfIn PDF document text
    • http://dk-inc.xyz/vumapebicxf.pdfIn PDF document text
    • http://bestita.space/a_movie_on_netflixwi52t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5ff69ff8b4e82.pdfIn PDF document text
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/2937204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5fe9e5e701ee5.pdfIn PDF document text
    • http://creditscoreusa.info/lijunofefuwuleginebanuwunoiy5p.pdfIn PDF document text
    • http://zabavnyi-slon.ru/nigukikitopekujax4a9zj.pdfIn PDF document text
    • https://supokiroxuleniv.weebly.com/uploads/1/3/1/6/131606692/rumoresozu.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/hajameL/escape_plan_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/ihiihde/singing_lessons_nyc_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezorito/minacriss_icloud_bypass_tool_activator.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/gujarat_university_degree_certificate_form_2018_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 3316 bytes
SHA-256: 22f8d8fdddbe01b5bea80708ce1f0861c3974b7a501cbeb7d75136274cd5c492
font_01_sfnt_off00010a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 5684 bytes
SHA-256: cda617a266b3f742867a35ed9ae05eeb1134aec4d1798743261207d763adb426
font_02_sfnt_off00011d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D82 10824 bytes
SHA-256: 8a0a50f342a33fa4c7008a9aa975ed88f5d505db6679b6affc5e51b04733859f

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