Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93a0f8a4c68f006…

MALICIOUS

PDF

83.7 KB Created: 2021-03-29 01:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0405a66a036620474145000dee644290 SHA-1: 9ebde151f6187186210fe66755c49980fc2a87e1 SHA-256: e93a0f8a4c68f006b72204d5b259e8910ed64dbf471e8f91d0a2fe29392969ab
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, as malicious and likely phishing-related. It contains numerous embedded URLs, many pointing to disposable domains, and is described as a link farm. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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://gimoguvi.ru/strik?utm_term=que+es+la+ense%25C3%25B1anza+seg%25C3%25BAn+autores PDF link annotation
    • http://buytoday.cc/complex_sentences_exercises_with_answers4qj51.pdfIn PDF document text
    • http://rofogukiluvupu.mygamesonline.org/can_t_hold_us_marching_band.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_60009181e73ef.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/zikibujos.pdfIn PDF document text
    • http://thepropheticapp.com/needle_emg_report62fez.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/nabevekonibajuvuvo.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/what_is_an_example_of_thesis_statement.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486368/normal_6018859a111ca.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/e67d5515d1.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/sixuzibexibi.pdfIn PDF document text
    • https://sudegefaxir.weebly.com/uploads/1/3/5/3/135323135/xirebo.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/city_of_endless_night_download.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/9e9b43cd-d293-4f5a-944e-55cbe15d3579/how_to_make_friends_with_a_stray_dog.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/wordly_wise_book_8_lesson_12_answer_key.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/18757702084.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/lion_king_food_chain_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f31ed6-8567-4cd8-9dbc-08fe4e43d791/symbolism_of_eyes_in_the_rocking_horse_winner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf8211f-6b18-48fc-87dd-a76691c1cbed/deliverance_james_dickey_quotes.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_off0001087f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087F 5292 bytes
SHA-256: 9246fde3fdb15647a3b289afd5c07356966df6aa3e3a721d246fe7efa005cc38
font_01_sfnt_off00011a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A20 11652 bytes
SHA-256: af3de6244e911352efb6af64444035f80bf8ba4efb290d6f2e4fdbf288ccc8b0

Open this report in the interactive analyzer, or submit your own file for analysis.