Malicious PDF — malware analysis report

Static analysis result for SHA-256 1acdaabe3de7b0d2…

MALICIOUS

PDF

78.1 KB Created: 2021-02-27 09:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f41c9beb0633186b0a9d0c38cfd3de22 SHA-1: 564dff4d923ee939fbb57193fb6d28b22b8532b3 SHA-256: 1acdaabe3de7b0d2be75d6e3e554040aca184c5f19b5b425303cce6fb98785cf
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the presence of suspicious URLs and the PDF's structure suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/aws?utm_term=photive+speaker+bluetooth+pairing PDF link annotation
    • http://naliputa.mywebcommunity.org/famazepigukowifexukuleb.pdfIn PDF document text
    • http://trokot-roznica.xyz/change_background_color_android_studio_javaidda6.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/how_to_open_ezdrummer_2_in_pro_tools.pdfIn PDF document text
    • https://vutojakapejir.weebly.com/uploads/1/3/4/8/134895653/gozikexaporivepomig.pdfIn PDF document text
    • http://acupofjacob.com/clculo_de_una_variable_trascendentes_tempranaskcndn.pdfIn PDF document text
    • https://cdn.sqhk.co/batijuretak/IlwjbwY/cute_baby_sms_ringtones_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/geFridh/happy_wheels_demo_free_download.pdfIn PDF document text
    • https://jabevemejo.weebly.com/uploads/1/3/1/4/131483275/5142081.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/9565025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/26666040702.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/british_council_ielts_application_form.pdfIn PDF document text
    • http://zowomazo.epizy.com/customer_experience_framework_template.pdfIn PDF document text
    • http://sutusagavol.epizy.com/how_to_set_a_motion_detector_light.pdfIn PDF document text
    • http://rofijukerogozo.rf.gd/lomemarebenodupatimidatak.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/onkyo_tx-sr604_remote_control.pdfIn PDF document text
    • http://xunevonobi.epizy.com/94420899396.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/82326715680.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_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 5348 bytes
SHA-256: 0d860c75df2973d0d7d74141811109caa2afe837c87c4d4ed8d884a4c992b088
font_01_sfnt_off000105c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C3 11108 bytes
SHA-256: be5021fbda3a77335c6ec7a581393e91f90a3f0a45c92685420ca54a99cf36f6

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