Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff9ffa95d975370…

MALICIOUS

PDF

84.0 KB Created: 2021-03-20 18:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 52069906c4f179a785e7f1969e977db3 SHA-1: 5c616a8b58ec02b8fe8d4d35f45ffaa93167c47c SHA-256: bff9ffa95d975370798eae320dbd56cd7597fb6cbd8433699b41f4d97a680a4e
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 0.9992

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://crophysi.ru/aws?utm_term=how+to+draw+a+graph+using+quadratic+function PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481527/normal_6041ac3f0c553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_601879c485b65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420597/normal_601ec9c01f703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479454/normal_5fe08fe521be2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474746/normal_5fcf461782155.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/arithmetic_sequence_worksheet_answers.pdfIn PDF document text
    • http://goxamid.mypressonline.com/dnd_5e_fighter_main_stats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408864/normal_6007fa9445869.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480743/normal_5fefd018c8f2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cfb20ca-2f24-4e99-b6dd-843ea55235a0/how_to_find_empirical_formula_of_benzene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d47c63-6259-488b-98a4-91dbe4f37815/is_peloton_worth_it_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/bitedabag.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/zakoxum.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/bit_mesra_patna_application_form_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02a559d-1f35-452a-90f9-0e3c82e72598/free_cdl_license_training_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/suxurufixedax.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/fagawaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7b76be-3da3-4053-8fa2-043457a91797/cant_help_falling_in_love_lyrics_and_chords_key_of_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4308696-2d81-4602-b161-636130b5d198/jump_rope_exercises_for_abs.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/adjectives_and_adverbs_grammar.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/zuwilelilegiwesijivevaz.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/tugekivusonejewowopawo.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/ielts_reading_passage_beneath_the_canopy_answers.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_off00010925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10925 5564 bytes
SHA-256: 9d0dd12ab66721d43dece611b86ae5c505eba5abf936a5ce05e2a25a0af0fb95
font_01_sfnt_off00011c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1C 10908 bytes
SHA-256: e2a2d70f1efd34fbe43477d9e32a170eefecfc31ae8a7347e45fde8efcc00a5f

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