Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b6b24280a5bc55…

MALICIOUS

PDF

74.0 KB Created: 2021-02-27 03:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ce514d8cb22c3a1abdec811886dc0eea SHA-1: 7eededf02f588be50ee23393d40f03b8096e1e6a SHA-256: f7b6b24280a5bc55432da08f26cc73309febce6cb5c9c993af6eaf06b91bfa9f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous external URIs, with a primary suspicious URL pointing to a disposable hosting domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's structure is designed to host many links, likely for malicious purposes. No scripts were extracted, but the presence of external links suggests an attempt to redirect the user to a compromised or malicious site.

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://midufefew.ru/123?utm_term=can+i+share+my+apple+icloud+storage PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421623/normal_5fcaf23676ae5.pdfIn PDF document text
    • http://igcopyrightforhelps.com/297314829161qdb2.pdfIn PDF document text
    • https://cdn.sqhk.co/javepuju/HMyHCgj/dadozolu.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/xO1jg2Y/bell_buzzer_circuit.pdfIn PDF document text
    • https://mavabebuvaxar.weebly.com/uploads/1/3/0/8/130814237/d6095c36d466bfc.pdfIn PDF document text
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/govarizexomavix.pdfIn PDF document text
    • http://shopsupergood.site/joxigugotosikelomalizowos4lo6.pdfIn PDF document text
    • http://itfamily.info/destiny_2_raid_guide_last_wishrzkct.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/dhbhfge/stickman_revenge_3_reaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_603052fd5dc7a.pdfIn PDF document text
    • http://mnatural.space/geek_squad_mri_alternativesvi6y.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/2Xlu6jd/wirojuvotepa.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/3197445.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/eJ0qOgg/miranda_kerr_wedding_dress_replica.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/gdUijja/kavubomujedarisevebovefa.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/is_nikon_d5100_a_good_camera_for_beginners.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD771 6168 bytes
SHA-256: d841e6ee9fc5f8d88f1d94419f2a0f587508a927e8deb92e2b18ca34c352e48a
font_01_sfnt_off0000e710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE710 5496 bytes
SHA-256: b1d22620097aba041f8441b66489a702f44066572a4d05f1a069f90571052b3b
font_02_sfnt_off0000f999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF999 9572 bytes
SHA-256: 85d82d2f7e9d51d613ce7be428ba129be1f2f32ed852598ac653d5e76e006dd1

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