Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bc2a04cd33a340…

MALICIOUS

PDF

77.3 KB Created: 2021-04-11 00:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d0443d635c07fec97169a95142410b00 SHA-1: b85e65b4f4ddb47e2f0bb2c733d4869c08170d19 SHA-256: 64bc2a04cd33a3405c623d2d4e0d7ca9cb00f9b01bd81cd49bc26e1b6d025bf8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded links suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

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
  • 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://gimoguvi.ru/strik?utm_term=how+to+use+sumif+formula+in+excel+youtube PDF link annotation
    • http://janafan.scienceontheweb.net/pixen.pdfIn PDF document text
    • http://wotaged.22web.org/17160615368.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/EUhaido/cute_dog_life_jacket.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/gdpidLp/christian_bale_wallpaper_mobile.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/meaning_of_neolithic_revolution.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/365c6501-3013-477f-a5ce-fe49258d1e5c/simcity_4_money_cheat_moolah.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/96951575151.pdfIn PDF document text
    • http://xuratuf.epizy.com/roduwifabuxu.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_7ed12827dfca4b398c73b3bd108866f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e972082e-d892-42ad-be14-7db7d6fa0251/torerikametifax.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/mufetuvatipeluzodemopu.pdfIn PDF document text
    • http://xesugowoxufe.epizy.com/boost_android_box_wifi_signal.pdfIn PDF document text
    • http://duvodix.myartsonline.com/how_to_adjust_seat_on_schwinn_bike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231297de-b459-4113-b4ec-cec80c6e78a1/vonipozijovatuzusarefavex.pdfIn PDF document text
    • http://fejoguxufipen.epizy.com/vavopamomonezedaripamedet.pdfIn PDF document text
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_119e9d853af64cc9a458fc80d3c691b6.pdf?index=trueIn PDF document text
    • https://c79dcb07-c1b1-4d84-a600-6417d8bf0f54.filesusr.com/ugd/edce22_bb9591aecddd4930842e15a37d5ab605.pdf?index=trueIn PDF document text
    • https://6ada6c45-9e8d-4063-9633-40b9e375d9b0.filesusr.com/ugd/9a7afa_f3ee532b816549949cc823dbf1e3c17a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2653fe6b-c664-4a93-ac96-56de8cb16eed/58785466181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91cd5a5e-e417-47ae-8b10-fd7fddc12581/read_eclipse_online_free_vampire_books.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_off0000ed57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED57 5388 bytes
SHA-256: ae92f833532c9f113a38189855efd977558b5feef2613a85358bd96e66cb4732
font_01_sfnt_off0000ffab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAB 11736 bytes
SHA-256: dbb021f8323f165acd0ee428efe208021b9d2a8213b27107577df60bb51f1032

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