Malicious PDF — malware analysis report

Static analysis result for SHA-256 68871583e286d465…

MALICIOUS

PDF

118.5 KB Created: 2021-05-27 08:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d4cfbc766bafdddd05e4511bc5cdb634 SHA-1: d0105cadf8a0f955ddaaa8af8cbdc0e81ca1d81d SHA-256: 68871583e286d465709a974923b1e33c1c6465063f8298a664e997a21b46c654
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The primary URL, https://vilenefex.ru/strik?utm_term=autocad+architecture+2020+manual+pdf, is presented as a manual but likely leads to a malicious site. No scripts were extracted, but the PDF structure and link farm heuristics indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/strik?utm_term=autocad+architecture+2020+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417208/normal_5feef21a8189f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_601a64bfb1dcc.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/xagazob.pdfIn PDF document text
    • https://nipixajivoru.weebly.com/uploads/1/3/1/4/131436983/jumefikovapi_fibupunit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_60378ebf4e43a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373239/normal_5fca015e20472.pdfIn PDF document text
    • https://xasewaverafi.weebly.com/uploads/1/3/4/8/134868265/3795291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_602806ad85bf4.pdfIn PDF document text
    • https://bosogafowobalo.weebly.com/uploads/1/3/4/6/134614472/xokazawur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_6036b0d43a2f6.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/8895401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419851/normal_5fc7f410f411c.pdfIn PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/vetevero.pdfIn PDF document text
    • https://tipizilij.weebly.com/uploads/1/3/4/4/134462633/gurasa.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/51f99381-3427-447e-9075-9935c1a8740f/pediatric_primary_care_6th_edition_questions_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f416b6f-f786-42c2-9fd6-c5f4ff6c226d/dell_mouse_km632_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af97b73-469e-4b87-8130-436b1e63790e/64683740730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b24310f-8985-4034-90f4-3d887944e856/yaesu_g-450a_rotor_cable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386feb17-a384-456d-bc79-5103eded78bd/29091754279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeaa13b2-5264-4830-96f1-4ed42157bde3/dixenofizirutodapejebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eda7ff1-2d83-417d-9d67-16de3f8b4a27/wunitalolasez.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF205 44604 bytes
SHA-256: 348f1cd6d122f050bdec37623b1291f82c81a52a906febb7ebe1ada988dd94a1
font_01_sfnt_off00017c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C2D 5480 bytes
SHA-256: 3eaa742e3fa0080bc27980a06ab92599fa405c55d2e36236c5cefec430d479fe
font_02_sfnt_off00018ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EA9 11304 bytes
SHA-256: c51691f83421b49489203e92f21bb904241a1c646d2df0caef66124ab71ca4e5
font_03_sfnt_off0001b3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3BE 16456 bytes
SHA-256: 20327e2838f36be2dbf08f67a9900ccce15f2b27c957541c2f9716bfe54ba9dc

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