Malicious PDF — malware analysis report

Static analysis result for SHA-256 675b5f95ebc956a5…

MALICIOUS

PDF

73.4 KB Created: 2021-02-18 11:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: acd7850905b2a454505a3d94de105224 SHA-1: 2b92d0998d7648f1c32b5691a6939c4bf923c966 SHA-256: 675b5f95ebc956a5f6497db1b4ea7014cb78daa91e4afb49ea10f31bb12fd9a0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high-confidence ML classification. The embedded URLs and the PDF structure indicate a phishing or malware distribution attempt, likely serving as a lure to download further malicious content. The file's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/strik?utm_term=modern+brush+calligraphy+font+free+download In PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/7456355.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fd06db49aa7a.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/hifjiIv/dodawirogatatevanofa.pdfIn PDF document text
    • http://mebets.xyz/6305339460j1yt.pdfIn PDF document text
    • http://hookup154.online/xolafuxatunibasuvaginob63kdp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5fd99ef4ada24.pdfIn PDF document text
    • https://cdn.sqhk.co/jalizovi/hjfwpij/hello_ludo_live_online_chat.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/Rjfjbje/tennessee_titans_roster_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366321/normal_5ff28390c5233.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/PIaYYjb/video_downloader_for_instagram_repost_instagram_apk.pdfIn PDF document text
    • http://getliterate.online/vawifulojejifinururab1ub1.pdfIn PDF document text
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/8500273.pdfIn PDF document text
    • http://ca-manalapan.space/certificate_frame_png_free9ak0n.pdfIn PDF document text
    • https://wunabigoji.weebly.com/uploads/1/3/4/8/134891590/nopezederewot.pdfIn PDF document text
    • https://fumitofid.weebly.com/uploads/1/3/1/6/131637255/4955691.pdfIn PDF document text
    • http://construt.site/98096815426zu62h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sobogasitizi.epizy.com/tezurafizil.pdfIn PDF document text
    • http://vipukexevuwe.epizy.com/20079588879.pdfIn PDF document text
    • http://danidagibi.epizy.com/form_24_return_of_allotment_of_shares.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_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 5756 bytes
SHA-256: e40d6d8602a8a65c75e36bd5e71ed8fb16fe61cae29633cc427a43c84c21a0ca
font_01_sfnt_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 10452 bytes
SHA-256: 62faa2d56955a5274d5ca617c3e0fbc6d0a6434f51af7ece82035fdd55ff057a

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