Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f251947c405c77…

MALICIOUS

PDF

76.3 KB Created: 2021-06-02 11:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 014564d32c1c3843d630bd9a6810148d SHA-1: a0ba31a171fa2a785c5122051a4f66ca3c30b135 SHA-256: 11f251947c405c777f75fb568ddba4ded112bdb7ea53917815d3f5cbe7efc5c3
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable hosting sites, masquerading as search results for free movie streaming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to redirect users to exploit kits or malware downloads. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to drive traffic to malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crysiq.ru/pbw?utm_term=where+can+i+watch+twilight+for+free+quora PDF link annotation
    • https://tajagarajoj.weebly.com/uploads/1/3/0/7/130776182/ea3f436e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427799/normal_5ff29837c7be7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4460070/normal_60b0cf479bbdf.pdfIn PDF document text
    • https://rakositove.weebly.com/uploads/1/3/4/5/134595637/rawinoka-jexafi.pdfIn PDF document text
    • https://guveroza.weebly.com/uploads/1/3/4/4/134484502/lupux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_6015a8dcb462d.pdfIn PDF document text
    • https://tunajixawovu.weebly.com/uploads/1/3/0/8/130873758/c4560f7c9c46.pdfIn PDF document text
    • https://dexuruxewiripo.weebly.com/uploads/1/3/2/6/132682754/powun.pdfIn PDF document text
    • https://tijanowu.weebly.com/uploads/1/3/0/7/130739502/5e4e51c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379616/normal_5feb26ab32f62.pdfIn PDF document text
    • https://dimegowogox.weebly.com/uploads/1/3/3/9/133999821/70012f6ef75.pdfIn PDF document text
    • https://dumimejotuwanas.weebly.com/uploads/1/3/5/9/135957909/8983782.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/viminijorinedogepimi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://risoxef.pbworks.com/f/tufepefonotuderadel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1aa0f6e-6b4c-497f-8343-7d8161a4672a/gigonetexut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b61a3954-718e-4879-b0fd-1eeae7f46e54/jivosopeluni.pdfIn PDF document text
    • http://veweran.pbworks.com/f/14322236041.pdfIn PDF document text
    • http://lomubel.pbworks.com/f/american_beauty_full_movie_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e650bc7c-0675-4986-943b-55f09429c8e5/19078751247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b387b45-3560-4fa0-9f9a-75bc4f67ad21/i_cant_make_you_love_me_piano_chords.pdfIn PDF document text
    • http://pupowivala.pbworks.com/f/vajaminegadamanajat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b57a7c6-4065-417a-b126-89b3702a1c63/cielito_lindo_letra_y_acordes_guitarra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82a4d142-e5de-478a-bd1f-2dc96f6fd265/himnario_cantos_del_camino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4743a63-d81c-4347-833d-5789dc477c65/how_to_set_timer_on_rogue_clock.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_off0000ec16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 5196 bytes
SHA-256: 8e80d192486f4a8209f176d4c0ae62e83ed2139a1ace6f52f42e2d4452ad757b
font_01_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 10576 bytes
SHA-256: cae89c618e615bb4fe965e23722e9806569cba5ef63b957860fec7ce27faf841