Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd394ae8164c2f8d…

MALICIOUS

PDF

82.1 KB Created: 2021-04-30 06:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e654fa4789ec7ab8f9b67b53ff0693bb SHA-1: 22c36f60e9d6ca462c338e8b2b29f6fd9f068248 SHA-256: cd394ae8164c2f8d650b001cf73026f45cafbb1747fa65fc36127efbfd30620c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or to serve further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, suggesting a tactic to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=more+practice+solving+for+angles+in+triangles+worksheet+answers PDF link annotation
    • http://jabilevij.mypressonline.com/adecco_thailand_salary_guide.pdfIn PDF document text
    • http://mefuresum.iblogger.org/34622382528.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/degujilaxe.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/general_ability_test_questions_with_answers.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/the_power_of_doing_less_download_free.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/learning_english_alphabet_worksheets.pdfIn PDF document text
    • http://bukejasinopa.22web.org/treatment_for_oral_lichen_planus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_c53f56311fd143db92c78f44a39b97b3.pdf?index=trueIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_37a6e47c08ca4feaa5803b56bbbdd48b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a4099e-f805-4e00-b4c9-0e7fba13e5a2/76192761081.pdfIn PDF document text
    • http://supijidexigoba.epizy.com/mivebopolatuzexulamuxoja.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/16773925680.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/wifinodaxuko.pdfIn PDF document text
    • http://goxojerodumofag.epizy.com/coleccion_de_cantares_mexicanos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3114ae-ae27-4081-ac70-02527c582b36/duber.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_2c930455f51e47dda9e854b047ef7084.pdf?index=trueIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/27782805380.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 5500 bytes
SHA-256: c384a01a3a83b117315f4808a8155fcd2f49e4017987f4d0324f8e71c8e9e837
font_01_sfnt_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 3128 bytes
SHA-256: 7a84c6cf4f46d4bac8fb6ba896b1cdf686c60a6b9912cc82b79a416172af7d16
font_02_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 11220 bytes
SHA-256: 51f4f334984c405fa40dea447fd63457e029a07fe15592b16bc71c7b52a54884
font_03_sfnt_off0001250f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250F 16140 bytes
SHA-256: 3f83bbfb2e03141a9083badfb1da6e2b1773f9aa6b1ed8f30fc2d392a5ee3553

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