Malicious PDF — malware analysis report

Static analysis result for SHA-256 faebb61121fc4caf…

MALICIOUS

PDF

85.0 KB Created: 2021-04-07 22:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 521ca8039c47f909120b431aa862a8e2 SHA-1: 7e6820a8b4290c26bec4ed91333f5712be457e0d SHA-256: faebb61121fc4caf431ac4f80de6bc8db0718001062339ad132cdd4be835cb3a
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 pointing to disposable hosting, and includes a UTM term suggesting a lure for 'dark sunset wallpaper'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/strik?utm_term=dark+sunset+wallpaper+1080p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405945/normal_603e2634172f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_60103ab60b4ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_6050efc4f1ccc.pdfIn PDF document text
    • http://xokapik.mywebcommunity.org/is_equilibrium_dynamic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_604b2103bfe85.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/what_are_the_parts_of_speech_and_their_definitions.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/d3ebf003-0f0a-4208-a910-6bb6239758a2/fedekifinurel.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/capital_accumulation_and_economic_growth.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_4ab3654956f14d4b8951783ac04e7c21.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_11cbf7c500474227a842a41e4ddc5f92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5edc66dd-dc0f-4267-a498-38c4fe384601/62230486017.pdfIn PDF document text
    • https://3544970b-b835-4bcd-b358-ee7367784d23.filesusr.com/ugd/0bcf16_bccd20fa1ec544be9b9d8dade265957b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4a83ce-2bc0-4b41-aa48-858bf22fccf4/rumi_books_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/la_la_land_violin_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/body_language_booka_shade.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_3373352fd67b4ecfb47f6c80b73f90a6.pdf?index=trueIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_691a7e52d2e744ddb0722570590ea6f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/befaxozumona.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_25bb47cb3df54f2e86adde924bf18240.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/where_can_i_watch_the_spook_who_sat_by_the_door.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44d1a8f-fd8f-421b-8357-658b46c342c7/best_solution_is_the_simplest.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_17f132d7b8c848b28fbd0d3076d303f4.pdf?index=trueIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_65eeafa12ee54007982ac8fc21f2f499.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_off00010482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10482 2900 bytes
SHA-256: 5226c763f3d4f3cbceb38bcb13217c6b3d4a8982263ccab1e51df51dbcfe70e9
font_01_sfnt_off00010ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED7 5356 bytes
SHA-256: 631089f85d1baaeb303de9a1ec034f9532acd3d34c8d782944ade34118b21d00
font_02_sfnt_off00012138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12138 10892 bytes
SHA-256: e5e025b924921d013d46484f97f325d801577677e236be5541fc702790ff7cd2

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