Malicious PDF — malware analysis report

Static analysis result for SHA-256 76714b00036023e7…

MALICIOUS

PDF

82.6 KB Created: 2021-03-19 05:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ca249de4f7373dcc7a3de731a3bd8e04 SHA-1: a3463cc89d93cc2c745f6c8d33e48c89c3615bf9 SHA-256: 76714b00036023e7ba5e84cc5bbe33b0c76270f1bab81fea8475f5f512faf5f2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high ML classifier score indicating malicious intent. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggests a phishing or trojan distribution campaign. The document body, though heavily obfuscated, contains text related to a book title, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/strik?utm_term=is+there+a+5th+book+in+the+inheritance+cycle PDF link annotation
    • http://fukuzowi.sportsontheweb.net/bemoziz.pdfIn PDF document text
    • http://contact-git.top/naughty_boy_lalala_lyrics_meaningkfiy3.pdfIn PDF document text
    • http://hushseo.online/list_of_syn_and_anti_addition_reactionsm8r1f.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/80608431829l9vq.pdfIn PDF document text
    • https://rimedugomo.weebly.com/uploads/1/3/0/7/130740195/893998a.pdfIn PDF document text
    • http://itnegozio.info/2251779312vhcct.pdfIn PDF document text
    • http://realwockyc.info/gobifoze06j7h.pdfIn PDF document text
    • https://setuzenizenu.weebly.com/uploads/1/3/5/9/135973655/34af611.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/rowux.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/big_data_analytics_wiley_publications.pdfIn PDF document text
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/c06c9a101a.pdfIn PDF document text
    • https://jimedugevebuz.weebly.com/uploads/1/3/4/4/134437071/fusorudu-lezesefolunosi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tomamujuf/after_action_review_template_usmc.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/tc_application_for_college_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851794ff-0e7c-449d-8f8d-fe7839397221/car_smart_price.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/atomic_habits_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c66387-4281-4bcd-ae2a-a1e12f9903b1/40841984969.pdfIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/delonghi_13000_btu_portable_air_conditioner_with_heat_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb3be83-6bff-4f10-b767-37f864a9ef9e/how_to_calibrate_omron_hem-7130.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E1 5044 bytes
SHA-256: d1b4140b9cab6ffba12ff2d5d15b4346bc24148af7550985d30fbd6540fc5e77
font_01_sfnt_off000105f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F8 12108 bytes
SHA-256: 0af0135f2e649f3f6c91f0bc16ed2f0cd7c96abc771e021b02693833fcfe3616
font_02_sfnt_off00012e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E88 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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