Malicious PDF — malware analysis report

Static analysis result for SHA-256 13839076fb7a426f…

MALICIOUS

PDF

82.5 KB Created: 2021-05-03 11:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2a484245a376a0cad9aa9f2463b7c55b SHA-1: 2efecb68063c0425b7e9da6ffa04f9b6d2141977 SHA-256: 13839076fb7a426f4bc6e2897dfd8a35ddeaa8434fae4f8099c7a25d112579cd
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to reference 'Remington 700 sps tactical 308 detachable magazine', suggesting a lure. The presence of multiple links on disposable hosting further supports a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=remington+700+sps+tactical+308+detachable+magazine In PDF document text
    • http://sevastopol.sale/luneto3ej4.pdfIn PDF document text
    • http://feyakast.online/poemas_de_amor_gustavo_adolfo_becqueruer1t.pdfIn PDF document text
    • http://nowtorrentz.com/29972175368tykgj.pdfIn PDF document text
    • http://ragitikevuwa.22web.org/2019_bollywood_movies_sites.pdfIn PDF document text
    • http://buzosidatiwe.iblogger.org/numajopa.pdfIn PDF document text
    • http://retys.space/blockbuster_ceo_who_turned_down_netflixik0fv.pdfIn PDF document text
    • http://megalit-korolev.ru/how_much_do_medical_laboratory_technicians_make_an_hourxscxw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xinasewaja.epizy.com/lalusezakuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce4be73-6d3d-451e-a7e2-32e6f190691f/how_to_operate_haier_fully_automatic_washing_machine.pdfIn PDF document text
    • http://gamojeliziri.rf.gd/area_autodesk_maya_student_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5b9a2a-0653-4b25-9a43-a780e6ad3748/washington_football_team_name_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d9d52e2-fbe3-473c-a896-645aca97b2c4/dujexaxeserujomodor.pdfIn PDF document text
    • http://muzokusadozejog.epizy.com/pokasepewodoked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e0c6d3-180e-4efa-8e77-08ef2588047c/what_moon_signs_go_together.pdfIn PDF document text
    • http://zadedasex.epizy.com/97361408795.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/56295933694.pdfIn PDF document text
    • http://selamamoli.epizy.com/format_cd_windows_7.pdfIn PDF document text
    • http://defurujaligat.epizy.com/31552800753.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/33087832355.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/facebook_lite_for_nokia_5233.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/baby_head_deformed_after_birth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac9b41c-7430-4d95-8eae-5183b305cff1/22182168936.pdfIn PDF document text
    • http://takoxun.epizy.com/88920660466.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/7375595857.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_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 6168 bytes
SHA-256: 40df309c6c07fd036853263031e72ad1cbb29c4151d5354abf1e6810d9011332
font_01_sfnt_off00011393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11393 11808 bytes
SHA-256: ab045fa5d3b3c11baca95ad7c52d4562c9b3d8f4950862f6deb09b5db1eeb94d