Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18bacc735340b57…

MALICIOUS

PDF

77.8 KB Created: 2021-03-21 05:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d7d45af225238531dac964e838170709 SHA-1: 5c04817910365435802a65b1c8f4608c0b8210e8 SHA-256: e18bacc735340b57e6c80d8f132df6dbff46e1fba8d6ef6bec32b915be5f2ef2
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://xajibur.ru/award?keyword=thinking+in+java+4th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/divojimo/beyhh5k/best_infectious_disease_doctor_dallas.pdfIn PDF document text
    • http://puwuditufu.22web.org/62230789441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_603d4882b3be2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471686/normal_60150fcf39082.pdfIn PDF document text
    • http://fipupibiveni.iblogger.org/20524170063.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/RAhjMHO/gozerilazazofidabitiguse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_602061408f2be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/where_to_buy_greenworks_batteries.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/20705105595.pdfIn PDF document text
    • http://finunaji.rf.gd/joriviwugudoboku.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/38162370175.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/lake_havasu_fishing_report_april_2019.pdfIn PDF document text
    • http://gixarab.rf.gd/weginigagivokomezojadobux.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/barnett_jackal_crossbow_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f60516-ae27-4df1-8bd7-e976ebaca547/how_to_learn_guitar_blues.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/wipulenezubulekirin.pdfIn PDF document text
    • http://giwolexuki.rf.gd/gopavufulada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5126a1a-293e-4c64-b142-869ba3c3d74e/vizio_sound_bar_remote_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137a4ed3-e544-4f09-96e2-4e712105f5cc/100_aos_de_soledad_audiolibro_capitulo_1.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/40630552612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9a6edb-bcb4-45cf-91e1-cbc157bf1fd2/42879315548.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_off0000f168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF168 5236 bytes
SHA-256: 8a42341302faca93269eeeed80a231928a028d0ba16faf5fd52f5ed81ee716c1
font_01_sfnt_off00010353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10353 10952 bytes
SHA-256: 6d369845af31188ab747b2002002a358f30ddc3e1eea767f450c27de847f1f53

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