Malicious PDF — malware analysis report

Static analysis result for SHA-256 a989173acfacd999…

MALICIOUS

PDF

73.3 KB Created: 2021-03-25 10:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1a2a3a911153baf7a72eef213a9afb0e SHA-1: 5a1f9b5f0b2862272d85d42717e2e9d6ff2a3e77 SHA-256: a989173acfacd9996798861cf91caa3028476533bf41742eef1dcabba9e387a7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=mr+coffee+owners+manual PDF link annotation
    • http://manamuposa.getenjoyment.net/how_to_become_a_software_development_engineer.pdfIn PDF document text
    • https://cdn.sqhk.co/febapaji/fgepSdB/age_of_empires_2_cheats_instant_build.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/jdgccAL/zuwesodutof.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/SigwUFq/new_hd_wallpaper_the_pretty_billie_eilish.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/vpohbEq/6641449212.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hdjeAjg/zombie_don_t_run_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xeribaba/H9iej9D/ash_flat_ar_cattle_prices_weekly.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/icaxchc/samsung_level_u_pro_anc.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/ns6jcyP/44961414015.pdfIn PDF document text
    • https://cdn.sqhk.co/tixelila/Phhhgji/69832981383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vajefam/axiomas_matemticos.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/43530612933.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/classical_conditioning_worksheet_answer_key.pdfIn PDF document text
    • http://kovemipenege.rf.gd/hall_effect_viva_questions_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0eed86e-53a9-423c-92de-864fb7443acb/rokatoxefupup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/693ae062-0644-4854-b8b1-1fc715df072f/lifubutijaremujema.pdfIn PDF document text
    • http://tofezaniv.rf.gd/30097775239.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/wodidamuzed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64e5f59-733f-45a5-91de-0704c0775d64/network_security_key_mismatch_windows_10.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/kewufigabojexisenomewatoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095f31f6-d1f6-4d81-b22b-333047eb908f/descargar_gantz_manga_espaol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34E 4876 bytes
SHA-256: bbdc056a92af9fcc545b796496441282f88394320968689f45f5445ce38c6147
font_01_sfnt_off0000e3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 10864 bytes
SHA-256: 6bdfbe8a48383d8ca861c3062fae079f5594643b440943fd923246d55b81c58a
font_02_sfnt_off00010850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10850 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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