Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5e1dec8738e0b2…

MALICIOUS

PDF

84.1 KB Created: 2021-03-27 15:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 7c7d8958dd3aac89708a8cb348ff096d SHA-1: abb837aba07a72e45c004478ec5d402052df0af1 SHA-256: 2f5e1dec8738e0b25ab8c93ca0ed0a732609ced887378b8c8926358f2f4949be
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URLs that point to other PDF files. This technique is often used for SEO manipulation or to distribute further malicious content. The presence of multiple external links on potentially disposable hosting suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://seumenha.ru/award?keyword=rainbow+english+8+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445573/normal_604067a40c830.pdfIn PDF document text
    • http://direkepexeg.22web.org/9956348749.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/xGibLgi/92137159662.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/Rjdifgd/talking_tom_ben_news_scratch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_603c7f3763d42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375210/normal_5ffa589ae6ef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5fd9c88e0ac75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_60570443ea185.pdfIn PDF document text
    • https://xurozakewera.weebly.com/uploads/1/3/1/4/131414240/rafuki.pdfIn PDF document text
    • https://nobexuliga.weebly.com/uploads/1/3/1/4/131405940/15ef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390069/normal_604933674a27a.pdfIn PDF document text
    • http://fazudoladuvegig.22web.org/blade_babji_movie_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413458/normal_60051d7447783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_605521fc465ca.pdfIn PDF document text
    • https://cdn.sqhk.co/dedomafub/Okbjghi/robozuvudere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454681/normal_600889bf62ea0.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/JVNfYid/slendrina_the_cellar_2_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/hqhghbU/sword_art_online_games_release_order.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_6038cfbdeb584.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/b2320fda-5506-42f8-b0e7-dd2f1c34e381/what_do_you_mean_by_the_term_alchemy.pdfIn PDF document text
    • http://zadajipi.epizy.com/nelesadorubis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04700b19-793a-40a3-84b9-a2c8f5dbf4d7/diwokilulunovadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929f1226-dce1-488d-bb12-00f4ad34ba10/57112676314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1429b9dc-f64d-4a62-8b18-d74c6037e5e3/series_of_unfortunate_events_episode_1_summary.pdfIn PDF document text
    • http://wirudulobaga.epizy.com/printable_counting_worksheets_1-_100.pdfIn PDF document text
    • http://jisevara.rf.gd/important_vocabulary_for_ielts_speaking.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE955 5640 bytes
SHA-256: 83b6514efedfc194c9a18242aef27d80d0d2d5f890b77c1096c3fdfc1b109a27
font_01_sfnt_off0000fc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9B 14984 bytes
SHA-256: 24dcaa57a04b2deefebe764a2991cb1e420a52fc80869376cc071a8b9f6db25e
font_02_sfnt_off00012b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B52 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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