Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdabbb11966e9123…

MALICIOUS

PDF

71.6 KB Created: 2021-04-04 00:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ac0fb090151ff7c13a42fe32b3174af3 SHA-1: 9e0a7dcf0393194843a16fe5ca5502e50cf34136 SHA-256: cdabbb11966e912321f5ffee76009d22f1bb5b73edfc83e0f85978e2a454fa5f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://lozipotod.ru/123?utm_term=amissima+vita+annual+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451950/normal_6064bac8bb5ad.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/42add2988.pdfIn PDF document text
    • http://sugalomiwuto.getenjoyment.net/upcoming_bank_exams_2020_19_full_list.pdfIn PDF document text
    • http://jadaribod.mygamesonline.org/metro_map_barcelona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_601e464b1c475.pdfIn PDF document text
    • https://wajigigo.weebly.com/uploads/1/3/4/5/134588105/1768411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_605859b4edf88.pdfIn PDF document text
    • http://fudazozotakaxal.mywebcommunity.org/xuwibozinedasiwitoxaxum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_6016134fab713.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/nifonorobenaxisaguvapase.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387573/normal_5ff82765ba0e2.pdfIn PDF document text
    • http://dufazesiz.mywebcommunity.org/bibafegetazulevomijujew.pdfIn PDF document text
    • http://newoxoxi.mywebcommunity.org/babukifibalenewolovot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekazaz.myartsonline.com/taber_s_medical_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/xujekexupilesozudija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41be1d4-9c94-4afd-b253-dc8b42b63cf0/how_to_set_up_cycleops_mag_trainer.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/6121373892.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/xapabopijafubijajogoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e912285e-2e3c-4571-a70f-117042678d27/pexaxagetoronuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/610cf0f5-add8-42f6-89c4-dbed848dbe09/how_to_be_a_scout_for_soccer.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/what_do_the_weather_symbols_mean_on_apple_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff73a64-c1eb-4f7a-b822-543304d757dc/pride_and_prejudice_2005_online_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6766c3d-53eb-45e5-9222-2e76ae2f3021/8505210817.pdfIn PDF document text
    • http://pigutun.myartsonline.com/biology_questions_and_answers_for_high_schools.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/passport_photo_template_psd.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_off0000d9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C7 5012 bytes
SHA-256: 8a7bb4372d7369229865cb3d228377c379d84e0a78ce6bce2a166f5e0c7f2070
font_01_sfnt_off0000eabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABF 11312 bytes
SHA-256: 2d6f3b476d74ac8a9c8b4da8a9eaae1329662f53af10e73c4bcc2274aa6bf5fb