Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88fb6a0cc4164c2…

MALICIOUS

PDF

80.6 KB Created: 2021-03-11 05:29:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: df42f06fa41e346b207c1d660d933554 SHA-1: b88909868bfafa2824e555b92750872865075521 SHA-256: e88fb6a0cc4164c21fe9d15a824fa89f632ded1efa91623c1d8a0dcaa73c74cd
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/award?keyword=breeding+rabbits+pdf PDF link annotation
    • http://wobafobigo.mywebcommunity.org/wejudajavitubegafa.pdfIn PDF document text
    • https://gixinizolovuz.weebly.com/uploads/1/3/5/3/135348456/6702242.pdfIn PDF document text
    • https://zesijedoroge.weebly.com/uploads/1/3/4/3/134372038/zarigurafaj-rorolarumaji-zerumuxavonakil.pdfIn PDF document text
    • https://moxalabukeziro.weebly.com/uploads/1/3/4/7/134772199/9215122.pdfIn PDF document text
    • https://cdn.sqhk.co/lopijikuvi/OjaB8A8/amazon_photos_app_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/gghcxU7/striker_galaxy_usha_fan.pdfIn PDF document text
    • http://lazotub.mywebcommunity.org/zokonos.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/a398ef5d.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/16481878422.pdfIn PDF document text
    • https://dixotusokor.weebly.com/uploads/1/3/0/9/130968976/mamenadabifoge_lakifoje_xetifor_ropugonof.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/cgcLJih/moto_actions_app_apk.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/oracle_sql_developer_download_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mizetum.onlinewebshop.net/77890143109.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_e9bca571c6f34bcd9e275e89390d5bb5.pdf?index=trueIn PDF document text
    • http://duxegejuw.atwebpages.com/seiko_solar_chronograph_v172_review.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/vabizedavenebofewejutol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58abb2c-734e-470e-b5fb-1206a8b43e10/05_dodge_ram_1500_fuel_pump_relay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8165f6b-c147-4d1a-b256-0e3555d600d2/35301010710.pdfIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_0e2f56c26957478aa5be5252022f5bf8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e393b271-c3c1-405e-9ec4-1c46cba8342a/garmin_forerunner_110_battery_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450d51a2-a854-4419-81f1-581eb36a1dd3/kigexibe.pdfIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_1225b6cbd784488c8527558a2044d5c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61dec14b-4531-479d-99ba-7808d245b4c1/bukawatatotafojaserifi.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_off0000ff25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF25 5368 bytes
SHA-256: 66a98a2621f6c9cbe1720216ec35c13654850909092f59bb00c1af8b5db98334
font_01_sfnt_off00011170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 10464 bytes
SHA-256: cbffa535825e0f036e77ebf599ac928a182696abc4be9997568e8fe512aaa0f8