Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcbfcb1be333ee4…

MALICIOUS

PDF

71.9 KB Created: 2021-04-01 00:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: aae0bdc9315f2240bc3fa414df81567a SHA-1: 7b9da4e0451e99679e0b8020268f9300df92d785 SHA-256: 8fcbfcb1be333ee4adc01c46b81da6c818c36b08580649dbcbedc291d90454ea
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URIs, with at least one pointing to a suspicious domain ('dugedepap.ru') that is likely part of a phishing or malware distribution scheme. The PDF structure and embedded links suggest it's designed to trick users into visiting external sites, potentially leading to credential theft or further infection.

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 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://dugedepap.ru/123?utm_term=indivisible+guide+colorado PDF link annotation
    • http://helplnstagramcontact6088757.com/duposujexumenownd409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417040/normal_603a744010bd5.pdfIn PDF document text
    • http://flowerport.market/berewitijilorakuvanenejuvwkw8n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_6036588fd8762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_605f833a64c81.pdfIn PDF document text
    • http://raisinsapp.pro/59812958476kjz2w.pdfIn PDF document text
    • http://bahis-sikayet.com/rujoxenokupugexemirimedotwdcku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412161/normal_60344f3530586.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/81119c54-bf1d-4ad6-9257-d63c8f3b3f2c/how_to_do_interior_design_courses_after_12th.pdfIn PDF document text
    • https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_cd20b5ce74ed4418a89d79f7b5cb5948.pdf?index=trueIn PDF document text
    • http://gixarewujedel.atwebpages.com/what_to_know_before_buying_a_small_business.pdfIn PDF document text
    • http://xirozaza.onlinewebshop.net/fupogoxoselokogewuta.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_49442ffd2eac4c13bc2d09a63f1acba7.pdf?index=trueIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_bb0ea036c02f420e83417cc04b3d51c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2ce856-5290-49c1-a9fd-4c20bf7e6d66/678944343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81fde32-2cc5-4ae1-a556-ec71be13dbab/u_satyanarayana_biochemistry_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3775b4-8c00-4e3f-b0ea-c37da3402e2b/is_taco_bell_sauce_keto.pdfIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_fa3bd34d93844ce3a59747f1c906bb8b.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_off0000d8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D2 5244 bytes
SHA-256: 78184fc2c1e84b9c0e35a021a0936780fd98b4719826683cb2ab12a733444474
font_01_sfnt_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 11600 bytes
SHA-256: ed0cd4d33e9a98c5a206ef1a5cf219afe9a0c85e10582962ddf529af6efc2ee8

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