Malicious PDF — malware analysis report

Static analysis result for SHA-256 5282a308cf10027c…

MALICIOUS

PDF

79.4 KB Created: 2021-03-27 14:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e634868da17cd69d48e9e24b46a6867a SHA-1: 40fa1b2baba458dc7a1986c26f9be1d6ca1645fd SHA-256: 5282a308cf10027cbb78ecf8170413e5a326dc061a827be2a6f6eb02a2525b2f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/strik?utm_term=warcraft+3+reforged+outsourced PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481675/normal_5fd657f3d085d.pdfIn PDF document text
    • http://baffer-shop.space/setusamerepasofavewezejyu9s3.pdfIn PDF document text
    • http://rfs.team/mipoplzidy.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/ggAohay/wings_of_fire_books_1-_5.pdfIn PDF document text
    • http://wiinorama.space/finale_becca_fitzpatrick_vko4hp8.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/ieL5hjc/ginorusinewitora.pdfIn PDF document text
    • https://cdn.sqhk.co/nizufalagef/geHpJ5b/movejokape.pdfIn PDF document text
    • http://de-bewertung-889562.icu/fuwujokofewezaruboc5kkd.pdfIn PDF document text
    • https://cdn.sqhk.co/kutogudofi/jeiegcJ/color_electrical_tape_home_depot.pdfIn PDF document text
    • http://makamar.tech/ng-_template_example_angular_7hqmx3.pdfIn PDF document text
    • https://cdn.sqhk.co/femogefuv/HgggeFH/rebel_cops_switch_test.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/eVhgL1t/awesome_tanks_2_hacked_unblocked_weebly.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/jhimhcx/buxubedekusakogezef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380699/normal_600477bf4db7f.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/jaswEh3/divizazuwerulaso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_413244831daa453c91026405f51b7108.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_98cda4db594846e7a4045ba8b138b95e.pdf?index=trueIn PDF document text
    • https://5f90d536-2a72-4461-adff-280afd3056cb.filesusr.com/ugd/27c394_fe8aabbc664d46cb9fc171b63a060490.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_06153d8ac05641179a2c98c5875f6216.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_9ba05179d71344c5be8f44af70f366ed.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_8c6db0fa7a6e4953ba00b209d3cddb7d.pdf?index=trueIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_54d53471b1f74debba11eb8bdb691047.pdf?index=trueIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_dbf349f0223942dab3a2df417306adcb.pdf?index=trueIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_bd1f3695b4dd40a184b154b36e160f7a.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_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 5336 bytes
SHA-256: 59c7c07a1bbca5b1a7bc81919d5b5ba6b9395961f2c6e0756348a354a0193177
font_01_sfnt_off0001030f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030F 13768 bytes
SHA-256: 32ca72ea6bc82caca2d47be9ef3067512add1b4a4e79c7f7de5413f0a19e6c54

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