Malicious PDF — malware analysis report

Static analysis result for SHA-256 804bfa8a838b7d46…

MALICIOUS

PDF

90.0 KB Created: 2021-03-15 18:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ecbd68b45a35d8d52d987ba53c5d7074 SHA-1: 570348d1892a2f47ff4726330e58f1f49280c2f5 SHA-256: 804bfa8a838b7d46c4c50f5c90c6dd3a2d56677e0bc12405cb9202ed072de056
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=neonatology+journal+case+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391335/normal_6031886fd28da.pdfIn PDF document text
    • http://steblin.pro/vufojatorexofaps08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5fd63855a6d52.pdfIn PDF document text
    • http://kushtanash.ru/how_to_open_a_sentry_safe_dial_combinationswp3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_604a956199e10.pdfIn PDF document text
    • http://mabay.fun/adjektivdeklination_mit_nullartikel_bungenaz34c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502178/normal_5fe1792442db3.pdfIn PDF document text
    • http://submit.neo-med.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/crockett_livestock_market_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/tuvojugijadawolazis.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/workplace_risk_assessment_form_nsw.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/capteur_de_mouvement_avec_arduino.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/berselancar_untuk_mencari_informasi_di_internet_disebut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe8ad84-2656-4dee-9db5-3e36c411aa9b/the_outsiders_anticipation_guide_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/45931639072.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/81256800553.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/monte_carlo_ceiling_fan_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6478f639-99fe-477f-87b4-72d25f236d52/contrato_de_arrendamiento_de_terreno_agricola_2019_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1dbf4a-7744-4cc4-96f9-5040ca3a2dda/what_type_of_graph_is_best_to_use_to_compare_two_sets_of_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b29f73-ee66-46e3-b262-a6e4b032a681/rules_of_playing_chess.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/how_long_to_do_deep_breathing_exercises.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E1 5248 bytes
SHA-256: c10bae641f51586420dafa1f94f61863cbc9ee72896bc8636f00a5fe826f9175
font_01_sfnt_off00011ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE0 12320 bytes
SHA-256: c5daa3c26b3019eed3556a63b73c9b474f5da61c991a6189893f7f9d3b1bcbfa
font_02_sfnt_off000144ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144FF 16304 bytes
SHA-256: d4a195e0c61efbf2410e6ba3bbf7041ddee1d4ce6d7a5860c4ef19cc496684ff

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