Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c094a5355ce802…

MALICIOUS

PDF

76.9 KB Created: 2021-03-06 09:55:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d530226318971686468164adf9488e72 SHA-1: 12e38fc0579bb3ed0ffad9bdf2ea34bda1cbb2e2 SHA-256: b6c094a5355ce8023b0cfcc7655b0e0dc4102bac46e440b95eb1d1cb088898e4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://soxebez.ru/wix?keyword=titanium+backup+no+root+apk', appears to be a lure for users searching for specific software, likely leading to a malicious download or phishing page.

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://soxebez.ru/wix?keyword=titanium+backup+no+root+apk PDF link annotation
    • https://wavafawiwex.weebly.com/uploads/1/3/2/8/132815000/polinevukukogebex.pdfIn PDF document text
    • https://vixadabunukup.weebly.com/uploads/1/3/4/9/134902839/muxijegiwenekow.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/5599115.pdfIn PDF document text
    • https://wixevilit.weebly.com/uploads/1/3/4/8/134873569/dowurefosesuzamikek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448731/normal_5fe4acc961e2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482629/normal_600f148ae0aa7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_5f65b4d2557a4995b34630b3f5111b5e.pdf?index=trueIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_187b7ab6f35f405182f9aedbd5699f6d.pdf?index=trueIn PDF document text
    • http://wevisoxa.epizy.com/buninudosivivo.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_c587b4c873ae4e878cc43bfcddb45c8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/design_doll_pro_free.pdfIn PDF document text
    • http://kopididutal.epizy.com/46043565412.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/43841086281.pdfIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_9a3fbc94c86b46bb882347d924323f6c.pdf?index=trueIn PDF document text
    • http://puvusevakap.epizy.com/plantronics_explorer_500_instructions.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_c9c2513e24694519b5125bb4bd4de1fa.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_309706af409d4a81a6243707a9f395ee.pdf?index=trueIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_e4f26b0467a147b0b8cfbecf4fa45575.pdf?index=trueIn PDF document text
    • http://lulanikigog.epizy.com/wireless_communication_technology_blake_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/battle_realms_games_for_android.pdfIn PDF document text
    • http://texatutegelemov.rf.gd/hierarchical_organizational_chart_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/nullclines_and_phase_planes.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_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 5020 bytes
SHA-256: 43b3b6c7a9a20c485d4b94e19a6635f168d7d9381fc24c474b16f286d00229ce
font_01_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 10288 bytes
SHA-256: d87b97fca3131bd3289eecd6d5512a7c8b418edebc9becee02fce4a04caab18f