Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f2820b66dc04e8…

MALICIOUS

PDF

162.5 KB Created: 2021-05-24 00:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 447aba1e6e00e93145439a9dd98df079 SHA-1: 9b1c2788bfae09eef05b6552d7a162ce47c9a45d SHA-256: e5f2820b66dc04e82d7eb4f672674f8e1796075f9fb710ae91f9881c39b7cd82
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/strik?utm_term=death+be+not+proud+analysis+genius PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366620/normal_6033dabaa278e.pdfIn PDF document text
    • https://jobajepefo.weebly.com/uploads/1/3/1/4/131482915/a7734.pdfIn PDF document text
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/7219074.pdfIn PDF document text
    • https://vepidatebodosa.weebly.com/uploads/1/3/0/8/130874400/7764376.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/rabipuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_605fa4b7b1970.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/pozusuxe.pdfIn PDF document text
    • https://fulesinarube.weebly.com/uploads/1/3/4/7/134729099/613da.pdfIn PDF document text
    • https://fimiwopagib.weebly.com/uploads/1/3/5/3/135315251/vituni-mibox-xipuf-juxurez.pdfIn PDF document text
    • https://lonitavow.weebly.com/uploads/1/3/4/3/134355974/xijoxagawogefokatez.pdfIn PDF document text
    • https://tofeniva.weebly.com/uploads/1/3/4/6/134625175/dijelowewalepa.pdfIn PDF document text
    • https://jobovivubip.weebly.com/uploads/1/3/5/3/135392816/xijexidukagusolowap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5feead4870e85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_60680e59c90db.pdfIn PDF document text
    • https://pibazamigudixo.weebly.com/uploads/1/3/4/0/134000525/83ee074e7040.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5ff0cd130e289.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/db473e18-fc42-4fa8-b149-6ff6d1760392/vojoguge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba8b214-e486-47f4-8f9a-dce6d6a4c591/91538495903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aab8e0a7-4403-44e4-98f0-5b4580d7677e/likireroxurefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f675ee5a-b553-40ff-8332-202a11337939/does_dell_latitude_e5500_have_a_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8bdc9b-c1fd-420b-bd31-883936aba644/jolajaxafexapolunobodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e50e7d-a49c-4bcf-9595-d34586deeeae/wopuwiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6d05cf-4631-48f8-8522-aaa8b3222671/focusrite_scarlett_2i2_bundled_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ded5a00-5810-4133-8743-10c3929e7f87/does_google_maps_show_history.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_off00024481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24481 5464 bytes
SHA-256: 2df1d3349d5c1a4dd294c57fbc94b42f9c78aa7400d852f5ac71d725978bf122
font_01_sfnt_off0002570f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2570F 11592 bytes
SHA-256: def941e2d70eeeddfef791f1729856b1b8b9a52f627976675665e56c18268234