Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bff56f08e25192f…

MALICIOUS

PDF

80.1 KB Created: 2021-02-18 02:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 31899b0a423fa99fa434376f02922ef9 SHA-1: 4416554df23cbb76752a5f959c02d7ec6b3bb6bb SHA-256: 6bff56f08e25192fd45e94d95d5fac47c6032a1761ac2c62e0cca5f72cbbf00a
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics and an ML classifier. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to a Craftsman pressure washer, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/wix?keyword=craftsman+electric+pressure+washer+won%2527t+start In PDF document text
    • https://cdn.sqhk.co/konosoka/0jhfMji/grandmother_gifts_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/icE8hhy/86152371098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413583/normal_602342fa4def0.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/Ojes5gg/android_tv_remote_control_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445573/normal_60032ad282b9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474169/normal_601e56a982be6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_5ffb2068970c4.pdfIn PDF document text
    • http://regvoolkim.website/zitifevexidjdqvg.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/yvbohgl/viva_video_maker_with_music_app_download.pdfIn PDF document text
    • http://ryukzak.digital/6323358869dgis6.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/jujoxewigapuvdur8h.pdfIn PDF document text
    • http://itrom.fun/alcoholismo_en_adolescentes_perui5jki.pdfIn PDF document text
    • http://greenbike.shop/whatsapp_messenger_online_descargarpur1b.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/Zcjegjb/applock_application_which_country.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454999/normal_5ff9c2bdaa7cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://favirivesez.epizy.com/pozukifoxazovuviwilu.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_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 5288 bytes
SHA-256: 7105435882c3f0c24c6456d752ce99c221727f3b8a8c65549853511c52abf8fe
font_01_sfnt_off00010ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA8 10752 bytes
SHA-256: 08d72cdd62910355bb645ba0c243adbfeb7855fd67b606e3c1ca8ea67ad373e0

Open this report in the interactive analyzer, or submit your own file for analysis.