Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e130217170bf97f…

MALICIOUS

PDF

82.3 KB Created: 2021-03-14 04:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c252f4a65a20048fd0d1f7f14706c3ba SHA-1: 20dd4c1513b5bf46cd88b6fbbaeca7d311d1c6d1 SHA-256: 8e130217170bf97f1166f1e25081766a11b58be3ff220b156157ced22fc9558d
194 Risk Score

Malware Insights

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

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mezovuduw.ru/strik?utm_term=how+to+make+a+compressed+earth+block+machine PDF link annotation
    • https://cdn.sqhk.co/papedajapej/udigdhe/world_war_2_propaganda_posters_analysis.pdfIn PDF document text
    • https://gimoxawoja.weebly.com/uploads/1/3/1/3/131380550/jedav.pdfIn PDF document text
    • https://jipoditilab.weebly.com/uploads/1/3/1/4/131407274/dexovijud_miludiwafo_vosujapusizoxix_sufek.pdfIn PDF document text
    • https://cdn.sqhk.co/ramekodetuwe/iacVihV/zuwipuwuworodado.pdfIn PDF document text
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/b35987b41db65.pdfIn PDF document text
    • https://cdn.sqhk.co/lekabewoz/ZjgCFup/vuwexo.pdfIn PDF document text
    • https://fitatopiwize.weebly.com/uploads/1/3/0/7/130739398/29fae3e68.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/4644553.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/narikud_vadimuzileke_kipinaguli_dogugireto.pdfIn PDF document text
    • https://cdn.sqhk.co/zedugixaka/jjcpLgf/2017_chevy_sonic_turbo_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/jbw7gdI/download_the_sims_freeplay_for_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/gjgcjdY/vefesuxuwidaxusopowipumif.pdfIn PDF document text
    • https://napuraviseso.weebly.com/uploads/1/3/4/3/134322211/6194498.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/jhigihh/dowotapuvenadenosepek.pdfIn PDF document text
    • https://todoxaladavefuk.weebly.com/uploads/1/3/4/5/134529573/legorixidaj_dekapumur_dazugusa_bamowazusobiva.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/8cd6a34f-9293-42b5-9424-388cdbd27588/43450389903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9af42e3-6ee1-4560-81cf-8ca0e573d338/teromijexolegigigefakol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b837555-9125-4a15-b21f-4717ee715672/dan_brown_digital_fortress_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9891685a-e877-47d0-b5be-fd55e07d8635/windows_7_screenshot_shortcut_mac_keyboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2aafc0-a98a-4bf6-b383-f01cf4adc866/guwowarezofadabuvaposuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd5d591-9ee3-474b-ba39-f50ab3d52b6f/the_rabbit_who_caused_all_the_trouble_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b45f4df-3c8e-44a4-a500-b7c7b2a0abda/tukekodakagogagimotege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31295d6-845e-4bbd-9c4f-ef67fb7d209d/pathoma_lecture_notes_2018.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_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 5572 bytes
SHA-256: 9c5ae3f5f8eafd515db0fcb0ff30c19f00716875f8dd981d3d449f72aff2a999
font_01_sfnt_off00011521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11521 11372 bytes
SHA-256: 12cf265c2c22e94a80c4d1b3c13099ba6041f7224b5ae02f4fa584298e33e261