Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0082e7d5fafaae…

MALICIOUS

PDF

79.2 KB Created: 2021-03-07 14:36:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c638e1bfd4ef6b06da646cc2ec74749b SHA-1: 77abbfe075651046f6688ac9055f681fd1a7d188 SHA-256: de0082e7d5fafaaec97b733c3c2d9cbba277d216b09c2cd31b288c1dfb033f12
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the nature of the heuristics strongly suggest the PDF's purpose is to redirect users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/wix?keyword=what+are+the+different+elements+of+theater
    • http://sport-stavki.fun/how_to_set_a_vivint_thermostat3s3ei.pdf
    • http://vipimuxatomefi.medianewsonline.com/68111012627.pdf
    • http://biwedujurar.mywebcommunity.org/jvc_vhs_camcorder_tapes.pdf
    • http://jusolul.22web.org/crystalline_android_apk.pdf
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/07178bd.pdf
    • http://vajukadezazi.getenjoyment.net/encpt_nutrition_diagnosis_terminology.pdf
    • https://cdn.sqhk.co/budafitanu/9ULgchg/kavipijakev.pdf
    • https://dudasajaje.weebly.com/uploads/1/3/4/3/134362454/a852c4d.pdf
    • http://kikebumanexewuj.22web.org/50562257027.pdf
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/bimuxekoparaje_mumezuga_fivowitavinon.pdf
    • https://cdn.sqhk.co/kutogudofi/hjshiML/crafting_idle_clicker_unblocked.pdf
    • http://gazzsheff.xyz/7589464856777k2m.pdf
    • https://cdn.sqhk.co/jivonaxadu/eNNiaid/toxuneninuporurodoxutedox.pdf
    • https://cdn.sqhk.co/jedugifaxido/ejgj7jh/world_history_book_series.pdf
    • http://meetporte.xyz/6568979827lq0hw.pdf
    • http://rozujed.sportsontheweb.net/short_story_competitions_december_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_7d0da2e8d7f14ac89a7603862f264158.pdf?index=true
    • http://dezoruxeg.epizy.com/area_of_triangles_parallelograms_and_trapezoids_worksheet_answers_kuta_software.pdf
    • http://levurugagizov.rf.gd/analise_de_coliformes_totais_e_termotolerantes.pdf
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_61061fc0144f4ec8a160ef3a8ee3e83e.pdf?index=true
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_1d1ea26441f6445782af80cbf859d12e.pdf?index=true
    • http://kojuvurapamox.myartsonline.com/hampton_bay_hugger_ceiling_fan_manual.pdf
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_1257b972c1ab4edb8704f7b5d10ef48c.pdf?index=true
    • http://putazosaw.epizy.com/synonyms_and_antonyms_worksheets_grade_5.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fba7.bin
8f809150f1aee67b95d17e4017bcb24936a860681d8a7396e4d0c0617c7aea0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA7 5160 bytes
font_01_sfnt_off00010d18.bin
ba7620367a6973a20237adb87dc023d8592d702f9db4fcc5f5837bba49b7c0cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D18 10036 bytes

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