Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff795fee6989fcf…

MALICIOUS

PDF

92.2 KB Created: 2021-04-25 20:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e71fcf5c6b53219bc0bb31132dbcc933 SHA-1: fe9294f709a7408a8975b13c09c19acfc576efbb SHA-256: fff795fee6989fcf8965d8f93dac4d25a85aa85b82a34c935f259850b8203db1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=what+is+the+most+ugliest+dog+in+the+world PDF link annotation
    • http://nukapag.getenjoyment.net/xexovage.pdfIn PDF document text
    • http://mubositesene.mypressonline.com/wumagabox.pdfIn PDF document text
    • http://metiwizonud.getenjoyment.net/tigekekogazoritova.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/bijetax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1da8ed44-92b3-4b87-9767-71d2d97efc62/26637410560.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_e0629a6e84e9457d8560e9870f32b812.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8a9368-cb1c-418b-bb02-3b2e152e7239/maggianos_reheat_moms_lasagna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11e5c01-a436-40c8-abf4-73b265beba03/sunforce_solar_motion_security_light_installation.pdfIn PDF document text
    • https://2aa0b900-127f-4603-a19a-6a731d3c9eb1.filesusr.com/ugd/5eaffa_35781bad2c5e464f94b6d92b511262b3.pdf?index=trueIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_f1329eefd131445a9ec384b117f21c46.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a770fef-b280-49c0-85c7-75d7ff68c2ad/11579545652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e98fdb-260b-4ea7-9f27-627994532eb8/24753125592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8771d7-8af0-4cfc-8d60-9263e3138839/57029920016.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_848acd3571574bd689e28e700f1782f4.pdf?index=trueIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_8e418107816a4a72b6535bb1a077916a.pdf?index=trueIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_ce5d116894e5465da4b9d95ec3ad734d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3704b122-0566-44a4-ba00-d8b82f3693aa/is_the_ruger_sr22_pistol_a_good_gun.pdfIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_62c72ba28598414abb3e42f3fee34aa0.pdf?index=trueIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_0e876469cffd460882126ef95228325e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bbeff16-22a8-4081-8f2d-bc439c3bf1a8/bissell_proheat_2x_healthy_home_user_manual.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_62327392f5204c55aac07092dd77fd84.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF3 5228 bytes
SHA-256: b21f397edf1074affed7dfcec79c2780d192659ad51319db4a153374f88f1dac
font_01_sfnt_off00012ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA1 10576 bytes
SHA-256: 4d7ca2c3d5e00e00f3a89f1e25c45f23c38c390e50fabd1b58032ee3719c2409
font_02_sfnt_off000152cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152CD 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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