Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd062161137bfc5…

MALICIOUS

PDF

74.5 KB Created: 2021-06-12 06:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 23697fedcd43ab34f5c51af906967a05 SHA-1: 0a7d964be92085da4543ab419ab15976b7295d52 SHA-256: 3cd062161137bfc5270fd2e618daf34a3f9b3d6153247dbcfb60760cfa9e7577
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting and employing UTM parameters, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents that leverage embedded JavaScript to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://chcial.ru/pbw?utm_term=price+action+and+pivot+points PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405652/normal_602eef9e87dce.pdfIn PDF document text
    • https://lutapusudifo.weebly.com/uploads/1/3/1/0/131070527/jexeleso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_604cef092709a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_60687000e00e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_6048e5e9ab4d6.pdfIn PDF document text
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/safafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371004/normal_5febbe492d0af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481540/normal_5feb5be99e189.pdfIn PDF document text
    • https://lidawoxijotixi.weebly.com/uploads/1/3/4/6/134659122/c8a33d53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_601223d738372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_60542e8e5315b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_600df8e89ecd5.pdfIn PDF document text
    • https://gajinuware.weebly.com/uploads/1/3/4/5/134597963/gisozo_kemiwad_fudarekiladenu_kolobaxum.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/27792a32ba9a.pdfIn PDF document text
    • https://larunigilusevim.weebly.com/uploads/1/3/5/3/135320243/efa8a8f0e7b.pdfIn PDF document text
    • https://tadebuwa.weebly.com/uploads/1/3/4/3/134366374/4328d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mogulobobis.pbworks.com/f/13913424362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08aa22b9-f6a7-4882-a1a8-8f799399a8e5/56270051601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bcf9224-41d1-400a-891d-296be5959fc0/millionaire_next_door_chapter_7_summary.pdfIn PDF document text
    • http://rizukokodi.pbworks.com/f/41987502452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63eab615-5381-4b0e-8a0c-0ce00d7eb98f/how_to_do_the_blood_of_the_dead_easter_egg_solo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6907d7-8a91-4f65-b3cc-698646055e12/how_to_repair_a_hoover_steam_mop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c7f134-49b9-495c-bedc-86617729a693/dremel_3000_vs_4000_diferencias.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_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 5096 bytes
SHA-256: a08b0279d369c671b2c8f5930090ff1c7383bdba26addf8744ad1fd44eca8689
font_01_sfnt_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 11388 bytes
SHA-256: 5c9ce4000409fd615f7bf3c579462266141a7e75b38dbcc5c0528360029d4ce4