Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcb95516cf6fd4d…

MALICIOUS

PDF

70.1 KB Created: 2020-11-13 00:33:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9aef71bf9d4e8fba02979bbd11aeb937 SHA-1: bc2f8e24ae542285931082855aae0fb84b91663f SHA-256: 2dcb95516cf6fd4d8e4c719216c4f5403a1e91d77b17baff1d173d4eeae0f8c5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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=tether+grenades+warframe PDF link annotation
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/banixejejuv.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/c2d59e95.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/2381658.pdfIn PDF document text
    • https://minufufigazibur.weebly.com/uploads/1/3/4/5/134528603/260162.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/tamimisewepuwu.pdfIn PDF document text
    • https://wanuwoziburake.weebly.com/uploads/1/3/4/4/134458428/7744239.pdfIn PDF document text
    • https://mujolopiwajini.weebly.com/uploads/1/3/4/3/134379833/mijagivet.pdfIn PDF document text
    • https://revibafejinaj.weebly.com/uploads/1/3/4/4/134485322/kipapegekexikutivir.pdfIn PDF document text
    • https://tijisikazodiz.weebly.com/uploads/1/3/4/6/134666015/vitabibadabasib_zogerov_nedavori_mozuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gedesisumi/46722952915.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/75740798077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69aef600-bc56-4cc9-b727-3f906698fd7a/vulenoroxodazipipigusib.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/relion_blood_pressure_cuff_error_codes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB978 4516 bytes
SHA-256: 3e8105d4a11538c77661ce9e788c97e0a8ddd4bd38b0e2b7b4982d15f3dda4b4
font_01_sfnt_off0000c93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 4960 bytes
SHA-256: b6221a22532509697e4fdcd66c160f6f3de20b3f5f8d81bcbabddf45876c67f7
font_02_sfnt_off0000d9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F5 10356 bytes
SHA-256: 2c73ad3929ca792375ef30466a98f515419c0bc4e5b3c68833e5c424d82b3f2b
font_03_sfnt_off0000fd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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