Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22f83d3ab354214…

MALICIOUS

PDF

70.2 KB Created: 2020-12-30 09:20:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 57bfe10b9c5a85af0afac6d73dd0aaff SHA-1: d25ab72ea58e86c8908ac8ad67f3be235be4a0b2 SHA-256: c22f83d3ab354214108529c717eccd5424d706b48cac68a3ed69228735f0b22c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The primary attack vector appears to be the PDF_SEO_LINK_FARM heuristic, which identified a large number of external links embedded within the document. These links likely lead to malicious websites designed to host further malware or conduct phishing attacks. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to a compromised or malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=draw+master+matter PDF link annotation
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/7deeffb24c.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/WQDBKXV/lemonade_recipe_low_sugar.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/ghsjcvc/faxedus.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/FK48gfF/cake_recipes_with_buttermilk.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/043120.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/8190488.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/WiejdOW/raspberry_pi_zero_pinout_i2c.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/hdiv3OD/81288057061.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/egggghc/happy_wheels_unblocked_demo_2.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/9be8d6a4-efaf-42fd-b0db-bf6e5e8a7490/charles_law_formula_to_find_t2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a3de26-da90-4bc9-a0f6-d7e349fedb45/byrne_v_boadle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86abe130-770f-4ccb-8820-55ad3af7bb4a/61253718835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637b4ce4-04ff-4fd3-8217-820aacc52098/logitech_k750_mac_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b1380b-a180-4b86-814c-06b5fd13591e/vino_el_amor_capitulo_100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa97127c-adba-483e-af62-3c4c8213fbfe/36745196030.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_off0000d8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F3 4888 bytes
SHA-256: 71e5ed8e8db0166af6d45f4a2089761c7b40a45043ffac3aa9111a50e28778d4
font_01_sfnt_off0000e990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 10208 bytes
SHA-256: bd2f4eaeb47cd9120ec9ddf0dafa976248adcb01525fd43409583a430c674228

Open this report in the interactive analyzer, or submit your own file for analysis.