Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb64c4c94688811…

MALICIOUS

PDF

77.1 KB Created: 2021-03-12 18:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ffa85124fdf54a042427e377a0a357b9 SHA-1: a104f9c867d279b53fc24683b861b1cc99cc84ee SHA-256: 9fb64c4c94688811d7f8a8d263af51ee82cc91c5a71532e6c2082bb2cc2b466a
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, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary focus on a URL related to 'mit app inventor apk download', suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/wix?keyword=mit+app+inventor+apk+download PDF link annotation
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/tikijomoxube_sepizosa_wagomuw.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/25841382546.pdfIn PDF document text
    • https://tiwirekofer.weebly.com/uploads/1/3/5/3/135314588/zubosuragof.pdfIn PDF document text
    • http://nalilix.iblogger.org/build_email_template_online_free.pdfIn PDF document text
    • https://kilexudu.weebly.com/uploads/1/3/5/3/135347894/8676930.pdfIn PDF document text
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/518602.pdfIn PDF document text
    • https://bewulikafujisew.weebly.com/uploads/1/3/5/3/135326730/4532910.pdfIn PDF document text
    • http://paxezimusosesa.scienceontheweb.net/what_are_the_three_main_types_of_symbiotic_relationships.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/292703f7-772a-4b22-8edf-d5c71659e1a3/is_giorno_alive_in_part_7.pdfIn PDF document text
    • http://mujozitovisiwud.rf.gd/79941565357.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/aliens_2_tamil_dubbed_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523e16d5-ec13-408a-87f6-fda7ab97b73a/we_should_all_be_feminists_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62fdef47-4a94-4083-bc05-36563ff925c3/what_to_put_in_my_vanilla_protein_shake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd480ca5-0dfa-4ff7-bf5a-2091b7fac131/analyze_multiple_tables_in_excel_2010.pdfIn PDF document text
    • http://gogewafusa.rf.gd/excel_survey_data_analysis_template_xls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ba8306-3777-4650-a2f3-319bd2d39a6d/asus_eeebook_x205ta_install_linux_mint.pdfIn PDF document text
    • http://tiwemevi.rf.gd/what_boots_do_navy_seals_wear.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/rewamupo.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/datasheet_of_hc-_sr04_ultrasonic_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/tijiwerudik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d10fd7-1de3-454d-92b7-65fcc5d1fc34/buwebovixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa6282f-c072-496d-b080-888554ddc85c/stihl_fs55_strimmer_for_sale.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_off0000f15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15A 4996 bytes
SHA-256: d62d922bbb844cb3bf2f54d6d832120f23637f3a4563658e816dc0770afc4180
font_01_sfnt_off00010289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10289 10512 bytes
SHA-256: e328b9f20ac5311a13aa65aa0b1e0a80b043e9ac8445a9f6248b5f70ff44bff9

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