Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2c6a3ce5c8fffe…

MALICIOUS

PDF

81.6 KB Created: 2021-05-16 18:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 96e55f2490080ef50a8d7fb9ce624224 SHA-1: 7b861a24b88bf6b0f4c4e514f5a6afcedf58e054 SHA-256: ca2c6a3ce5c8fffec22b16b435ac91f4a1c4da330d3856ffef5c36a9a9dab64f
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and appears to be junk data, but the presence of external links and the heuristic firings point to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://dugedepap.ru/strik?utm_term=waiting+for+the+barbarians+book+pdf PDF link annotation
    • https://cdn.sqhk.co/zikonidenijo/hgegegd/jixagimezu.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/aidLMYA/rasagemirozusolax.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/Ngj7dib/vhs_glitch_rewind_video_effect_app.pdfIn PDF document text
    • https://cdn.sqhk.co/biwezabob/Sm3GUQM/anthem_of_heroes_guide_2020.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/connectedness_topology.pdfIn PDF document text
    • https://cdn.sqhk.co/muzipajat/6bhg1q8/light_diffuser_sheets_perth.pdfIn PDF document text
    • https://cdn.sqhk.co/zufosupiz/hagjhhC/38608536409.pdfIn PDF document text
    • http://gifagudilul.mypressonline.com/download_film_nancy_drew_and_the_hidden_staircase_1939_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/fihidij/95736575404.pdfIn PDF document text
    • https://cdn.sqhk.co/wizevomorofe/7jg5fCL/putularuzufutagobe.pdfIn PDF document text
    • https://cdn.sqhk.co/tawakejolap/gfbWLia/95457390081.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/WL3oloc/hockey_monkey_irvine_california.pdfIn PDF document text
    • https://cdn.sqhk.co/vakiduju/jabJIgj/garderie_dent_de_lait_sodeco.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_95c6a656cbb042f59ccfa3bf461b89ac.pdf?index=trueIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_d86c0e3f02354437bb51ec738ff48faf.pdf?index=trueIn PDF document text
    • https://e9542b43-fb79-4c62-94a9-c66526381fce.filesusr.com/ugd/4142f3_48397a17159c4f0e838ae05de3a4c677.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c5ac46-625c-4046-ac75-21821980627f/why_was_government_of_india_act_1935_introduced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/731c752c-f45e-4438-ad21-0420aa82f57b/who_can_replace_a_man_test_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a1c5ff-4ac0-4407-8fbb-874772d41934/taco_bell_nutrition_facts_cheese_quesadilla.pdfIn PDF document text
    • http://nodikaduf.onlinewebshop.net/rifopanigesu.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_f5114d0480854d33852530b8b0d11bc4.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_off0000ffd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 5488 bytes
SHA-256: 05cb5ba440e970b178a117bedf5ade68136eecc8b7a6e63e17d3c2bb7848e69f
font_01_sfnt_off0001127f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127F 11368 bytes
SHA-256: e23b9d70bdcbfba2150f63366c013d1ee3becb728f91a0e86d3df9f95ca70541