Malicious PDF — malware analysis report

Static analysis result for SHA-256 58444031669d2e49…

MALICIOUS

PDF

78.5 KB Created: 2021-03-07 21:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5c0814fe718dace2ea1dad2bb0f8b3ae SHA-1: 00f1b86908e2f92ecbd13146c414573137b48d19 SHA-256: 58444031669d2e49f937439460853dbf23e957c208312e06769d6f0ac6dbaac0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, contains text related to 'Webcam image is reversed' and 'wkhtmltopdf', which likely serves as a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=webcam+image+is+reversed PDF link annotation
    • http://finansi-7.online/i_love_to_draw_ornamentmcame.pdfIn PDF document text
    • http://dkmz2.club/interpreting_graphs_worksheet_science_answersv3rc2.pdfIn PDF document text
    • http://cardio-natural.info/planeacin_estratgica_ejemplovujzk.pdfIn PDF document text
    • http://todayit.pro/addams_family_musical_soundtrackktepz.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/fenenudovone_dutokilumunor_xatolonezumen_naborerixu.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/how_to_shred_diet.pdfIn PDF document text
    • https://nasuzezigoma.weebly.com/uploads/1/3/4/5/134587751/672208.pdfIn PDF document text
    • https://farejebizaf.weebly.com/uploads/1/3/0/8/130815013/5eec51213b7984.pdfIn PDF document text
    • http://fakts.design/accomplishment_report_format_samplelqjcx.pdfIn PDF document text
    • http://themarkuzmusic.com/5054477304724086.pdfIn PDF document text
    • http://linefofaxugedu.mywebcommunity.org/vojaxi.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/3458750704.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/what_is_security_engineering_principles.pdfIn PDF document text
    • http://uorott.com/74444601349nvwh.pdfIn PDF document text
    • http://myfoxing.online/agatha_christie_filme_wikipedia_italianolv53i.pdfIn PDF document text
    • http://dutivozupofamap.22web.org/bagede.pdfIn PDF document text
    • http://leopolds.space/song_behka_na_parey_hut_lovev77ue.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeximojela.myartsonline.com/whirlpool_washer_drains_but_does_not_spin.pdfIn PDF document text
    • http://wasalesex.epizy.com/29577183289.pdfIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_bfacf3dba5b24d47be6410969ac03560.pdf?index=trueIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_5beac2e1d9c44855bda823a0b71ef57e.pdf?index=trueIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_ec33d6f4022149aa8db3da8739598831.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_ac8bee911f384aa18863fabc1ab724fb.pdf?index=trueIn 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_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 5440 bytes
SHA-256: ad5fa5d18a3caf9d8ffb7039ce7f470eedeb5c0d488fdf4fd686646414d103b5
font_01_sfnt_off000107ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107ED 10888 bytes
SHA-256: d4eccbdf8c0dcc02431aab0ca820244c77494d85a7227b9c46eefe7bb00f4a07

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