Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b4a499af660f3d…

MALICIOUS

PDF

74.7 KB Created: 2021-05-01 02:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2f93d069e60b92a5e35426a90ef2cace SHA-1: 8ab0cd3d352fead1337112ab527c895ac341d62b SHA-256: 17b4a499af660f3dedd3bbe74f420873614b9c4913c77a761027b8909a75df7f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://gimoguvi.ru/strik?utm_term=stephen+king+on+john+carpenter%2527s+christine PDF link annotation
    • http://ketokod.iblogger.org/camping_merit_badge_pamphlet_2020.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/if_formula_in_excel_2020_with_example.pdfIn PDF document text
    • http://effektzhizni.ru/871753801xnii4.pdfIn PDF document text
    • http://hushseo.online/monster_busters_ice_slide_on_facebookqn0dk.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/vosud.pdfIn PDF document text
    • http://zibanozoxepezu.iblogger.org/35993921765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476146/normal_5fc854c33908f.pdfIn PDF document text
    • http://sopugepibimel.mypressonline.com/23864560703.pdfIn PDF document text
    • http://bbflowers.net/vasokofemarozaturobaxiguxyemj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_600f590d8a505.pdfIn PDF document text
    • http://manibupefif.mypressonline.com/11443029552.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381529/normal_5fed783b81e34.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/nutricion_parenteral_complicaciones.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/lg_440g_tracfone_unlock_code_free1s0lk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481067/normal_600214bdaeb3a.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/animal_cell_vs_plant_cell.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dotopaku.atwebpages.com/cardiovascular_physiology_concepts_download.pdfIn PDF document text
    • http://kuwexugebukutim.rf.gd/us_army_new_apft_standards.pdfIn PDF document text
    • http://lalavuzotijosi.epizy.com/jiwibunabuselofo.pdfIn PDF document text
    • http://kirimogopagi.rf.gd/ledoxiwuk.pdfIn PDF document text
    • http://nubibubimalepik.atwebpages.com/sherlock_holmes_book_download.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_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 5440 bytes
SHA-256: 15ee9b2b67af7770f99ed054da203ca3c59a146bf85cbfeaee43fbf4a52b75fe
font_01_sfnt_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 10752 bytes
SHA-256: d4a0a5ac67c655fe74cd96a9b4a69f564e63f26402b0b19c98ed55f35cf9e7b3

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