Malicious PDF — malware analysis report

Static analysis result for SHA-256 0999917c7d757b51…

MALICIOUS

PDF

73.6 KB Created: 2021-03-19 13:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 547388cce48042ed79c1f6e78248e3eb SHA-1: 37ca1adce4b15bf53619a8ccb83543e7275274b9 SHA-256: 0999917c7d757b51ff74ef4b9e0514f72489f2e06a691e4721b65b727d0f8984
134 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. It uses an urgency-based lure. 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 0.9990

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/strik?utm_term=angelcare+bath+support+fit+in+baby+bath PDF link annotation
    • http://covidcapsule.world/are_old_nancy_drew_books_worth_any_moneyjvmdh.pdfIn PDF document text
    • http://akmurzina.com/kujamileragabeschis7.pdfIn PDF document text
    • http://lesanuzununefa.22web.org/ladobetaxexas.pdfIn PDF document text
    • http://instapriz.site/48616786998k1jxb.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/180618167978a8ix.pdfIn PDF document text
    • http://wordsideget.top/sr80h.pdfIn PDF document text
    • http://euroshopmn.space/sogajiruwezitud491nr.pdfIn PDF document text
    • http://shoplus.info/amoeba_sisters_photosynthesis_worksheet_answersuzoqg.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/jogf3IH/setamexuw.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/ujjghhe/tuzapugudajuvekaruxu.pdfIn PDF document text
    • https://cdn.sqhk.co/nizufalagef/1CC2Chf/sivifaso.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/tyN6Njb/sonukunoxexelajijomineram.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/23a81520-f453-4383-b998-c20d7e54f4d1/85955292249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830d051f-045e-4bd3-ab6f-c514074d1ad1/ligejokuwemumena.pdfIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_6e598f31014141759d394fcd370b6a9d.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_b0444a8654a34099bd392459cca6eaf7.pdf?index=trueIn PDF document text
    • http://demumerip.rf.gd/aptitude_test_past_questions_and_answers.pdfIn PDF document text
    • http://rajomijal.rf.gd/que_es_el_clearance_de_creatinina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a5fc9a-d433-4dda-9d88-cd3e629c628c/danby_8_000_btu_portable_air_conditioner_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2431b1a-2b79-49cd-98b0-501bc426c319/ti-84_plus_ce_app_for_chrome_os_extension.pdfIn PDF document text
    • http://lotawovuvowuk.rf.gd/pec_challan_form_for_renewal.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_3475db302f2c4df088c270d233c78067.pdf?index=trueIn PDF document text
    • http://bimuvugibane.rf.gd/sovekebo.pdfIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_630fbed010ef4a51b832c0c4016c0eea.pdf?index=trueIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_beaff56014394b22b76b60abf62c2737.pdf?index=trueIn 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_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 5508 bytes
SHA-256: 7d9cdadc55d5f1ee99cc53b12f60493983cd36bdeb6dde34bd7893b6ae3ddc8d
font_01_sfnt_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 12920 bytes
SHA-256: f131f274e1bfce1ce2aea720d8a9d9b58eb245ae22dd77deec21a16608e39c7f