Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6ab07e075ea90b…

MALICIOUS

PDF

76.5 KB Created: 2020-12-21 23:50:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b76c729d25272ca0e044f8ad3925096a SHA-1: affb8aa4db32206fa61877e7ed5d90d950290a7b SHA-256: de6ab07e075ea90bd59cc3bac3d9793735f8dd193367ae79e3a9e027fcf6880f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with at least 30 links identified. The primary URL, 'https://trafftec.ru/strik?utm_term=line+graph+examples', suggests a potential phishing or malware distribution vector. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://trafftec.ru/strik?utm_term=line+graph+examples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f9fa2f6dccb7.pdfIn PDF document text
    • https://wazawuxara.weebly.com/uploads/1/3/4/7/134762715/055e39c90.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/dosapisobi.pdfIn PDF document text
    • https://rurikuzusobow.weebly.com/uploads/1/3/4/8/134879219/94b007dcc.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/46e6b5fa21aceb.pdfIn PDF document text
    • https://wipibafupegivu.weebly.com/uploads/1/3/4/8/134868488/1706041.pdfIn PDF document text
    • https://kitujimozudek.weebly.com/uploads/1/3/4/3/134375735/kufida.pdfIn PDF document text
    • https://bolowarokarov.weebly.com/uploads/1/3/4/3/134349384/pasawijax_birewunuxanepe_wanidumoxoxeba_wuwimunugu.pdfIn PDF document text
    • https://mipixapotorifa.weebly.com/uploads/1/3/0/9/130969355/finirora.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/mijil_gageturibav_neruta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5fbda584e50fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f5b088c99b6d37a76c18/t/5fcadf221880ce05e83f6000/1607130915798/snapseed_desktop_kostenlos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da963a9a-f036-4545-9c1f-7471a84bed63/75857315103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d40a7b-46c7-4d11-a165-c0a5767902c1/rosoxazevenaxas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4e2e43-9c2e-4229-b91e-1069fff86b49/40180917971.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc140d917e7202640ec8ca0/t/5fcc08d75d2e6f3bda293d61/1607207127915/12352149829.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_off0000edc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 5240 bytes
SHA-256: 4f095c218c2f3bb786c316a1d2bf2128fa8ce356314091b406ffcd7b8051d632
font_01_sfnt_off0000ff7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 11048 bytes
SHA-256: 8bb8cfed5798ce7763c20086cce76efdadc8ebc7be8790ec692b6141d00e0c4c

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