Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ad951c25a71419…

MALICIOUS

PDF

88.2 KB Created: 2021-06-01 18:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: be9ffc8f5e875b92340890d62ef2a947 SHA-1: 5e1edebf422386904c49d7085797265b8f6384a8 SHA-256: 48ad951c25a714193d6c965e4465b56c4bd719ea14d97bade4982446ecfd8fcb
186 Risk Score

Malware Insights

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

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 0.9998

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://jottigo.ru/123?utm_term=canon+imagerunner+3225+manual PDF link annotation
    • https://bumudipokipilu.weebly.com/uploads/1/3/4/3/134350227/najixuduzup.pdfIn PDF document text
    • https://wesonibisizigoj.weebly.com/uploads/1/3/0/9/130969529/6200986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_603bc180842c2.pdfIn PDF document text
    • https://sipusojatavajuw.weebly.com/uploads/1/3/4/6/134606658/sidomazuzateri_xezutofan.pdfIn PDF document text
    • https://bemozepe.weebly.com/uploads/1/3/0/7/130739793/ludifawasuvim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5fd33fd0826de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409602/normal_600484d23216a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495391/normal_6057f8c64bd9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455198/normal_5fd84a66a9fdf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiduxikuve.pbworks.com/w/file/fetch/144423480/macbeth_act_4_scene_3_stylistic_devices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76663bd2-923c-4c1e-9284-a0ea72accfe2/mississippi_driving_exam_practice_test_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098a967f-177a-4e45-8c0c-f5ae6cf5e535/texizuzevunoxim.pdfIn PDF document text
    • http://fevosezew.pbworks.com/w/file/fetch/144440712/jean_baudrillard_simulacra_and_simulation_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9cb6e71-35f9-43d3-9608-75296ebd7d0d/50_shades_of_gray_3_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a56744-869b-470a-8d37-5bdac5a02017/ti_nspire_cx_cas_near_me.pdfIn PDF document text
    • http://zajozote.pbworks.com/f/download_autocad_2016_keygen_x-force_64-bit_atau_x64.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae4ed1f-3b63-4e4f-b15b-c4fc3f66b9c3/lg_v20_price_in_pakistan_gsmarena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8069eb5-3a5f-426a-bc99-230eb5254208/tumokitixogovarogijija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c5b820-a9da-461a-bf71-5b5f355d8607/sisivosexovokaxaxolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b185e4-c149-42af-aa03-00a957980edf/how_to_scan_35mm_slides_with_epson_v550.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_off00011ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED0 5152 bytes
SHA-256: d3ce5199edbb136d3c180453816e6c4a5165e2b2fb7cee30cf1d25cf24b1668e
font_01_sfnt_off00013044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13044 10424 bytes
SHA-256: 2e1863f2c87e1f0f0637f1e5be710b7b7f0f39d8fdf1dd67e79aaeaecf1bb80c