Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dae37346ace8b0e…

MALICIOUS

PDF

78.9 KB Created: 2021-04-10 13:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a9f9735ed43a8231eba099600f2c4628 SHA-1: 26d75b4cf9ca03edd7808dcc0da7785f3af1cd69 SHA-256: 1dae37346ace8b0ea5f282c78b5589e5723c476690079d9714d89f770be4df87
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical PDF_SEO_LINK_FARM detection indicating a mass external link farm. The document contains numerous links to disposable hosting sites, suggesting an attempt to redirect users to potentially malicious content or phishing sites. The ML classifier and ClamAV also strongly indicated maliciousness.

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://bologen.ru/strik?utm_term=canon+powershot+elph+160+battery PDF link annotation
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/kesefepitanoki_junisi_kapaki_gibowifonij.pdfIn PDF document text
    • https://malegudupo.weebly.com/uploads/1/3/0/8/130813961/7744661.pdfIn PDF document text
    • https://diwekivoveludu.weebly.com/uploads/1/3/5/3/135313391/siwuxoduzotenod.pdfIn PDF document text
    • https://tupodoki.weebly.com/uploads/1/3/0/7/130776149/dd76b951e48c.pdfIn PDF document text
    • https://kaferafodi.weebly.com/uploads/1/3/0/7/130775544/9711859.pdfIn PDF document text
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/pinavixufikam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_6026a846b4c7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413119/normal_5fc8af0388452.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/mikuwosag_sadaner_dokilenelagudav_vaxemudotiri.pdfIn PDF document text
    • https://kulojavovapevim.weebly.com/uploads/1/3/4/7/134746555/kixin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_603f1dd86fcbb.pdfIn PDF document text
    • https://futokiwusilo.weebly.com/uploads/1/3/4/4/134458686/katuperululaka.pdfIn PDF document text
    • https://mafojavakafox.weebly.com/uploads/1/3/0/8/130814343/gowisozum-lixodifivimik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_f83b34543d5c4b58802728a79037bbe6.pdf?index=trueIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_eca9b00eb1c24961b6063fdb3df5ef6a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/axial_yeti_xl_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6284e116-6029-4e26-9b03-ebba4de24169/58982176140.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/2020_ford_mustang_gt_premium_convertible_for_sale.pdfIn PDF document text
    • https://83c30a2d-d83c-4020-88f4-fdb7bed8c9e2.filesusr.com/ugd/e59e18_b4ac59ef4336447db1bf05dfafb88a13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosagoba/sendgrid_email_marketing_templates.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_d56114f44cdc4e0fbdf1887ea0e590f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falevi/vector_border_design_free_png.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66adeb65-f5a0-4bd8-921c-208d02d89a64/as_a_man_thinketh_in_his_heart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f39a8a9-24d6-4f74-851b-cccfefd4c5ac/nilevonuvive.pdfIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_274a2323bbf8477786c49b3bf767abc5.pdf?index=trueIn 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_off0000f5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DC 5492 bytes
SHA-256: 1f041dca3260ef8697ced2afce67791ad87ec2d7071e4d9ad898f4cfd5431cfa
font_01_sfnt_off00010898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 10940 bytes
SHA-256: f1d47683161564dcefc871ebfe5fabe021380381147c5f8a281849e02796a4fa