Malicious PDF — malware analysis report

Static analysis result for SHA-256 f41446f7dd38a101…

MALICIOUS

PDF

76.8 KB Created: 2021-05-20 21:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c77630bfe1ca4405eaccb47ac761a8e3 SHA-1: 15e404ae1f5f49e05024e14692bbced4e664f45e SHA-256: f41446f7dd38a1017d64ccb001b63eeef792ba6b20c21a722f09f89a4246319d
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 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=english+speaking+worksheets+for+adults+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461207/normal_600121db9d47a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481828/normal_5ff3b9efe31b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424996/normal_601e74f3a3d7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_606b7e59086a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_605df40f145a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_605717d4cc6fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447626/normal_602f375ba9ab7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462093/normal_5ff8b502e4831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_601d237d56986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_60230e2ca0638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_605c4a4f8e568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_6057986145de4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459780/normal_5fd21cd1ee053.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/fajixe/fadekowosut.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/skype_apk_for_android_4._1_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f9a8da4-2b0b-4367-b5ac-ccd9d0b2ebc0/is_the_blind_side_film_a_true_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9ab82e-0db0-4931-98c9-2c0ea8ea9038/windows_10_64_bit_free_download_full_version_with_product_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344ac65a-d04d-4ae1-b4c1-2edb4543e64f/78653305596.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/hoover_steamvac_not_picking_up_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b22b30-3842-484a-ba38-89f6e10c48b1/10268427842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5607796c-29a8-400b-9eaa-7d81fb392702/red_dragon_bookstore_girl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d1bddff-fbe3-49ca-a548-1249d16d43de/85475159301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5026e065-0c95-4bc9-89d8-019cda5a1d54/how_to_fold_the_graco_duoglider.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/sample_term_paper_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/10_000_reasons_choir_sheet_music.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_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 5416 bytes
SHA-256: fe7859983db7b2bc0924be735fdc8615bd706b29413e04dafa2fb260bcb7e094
font_01_sfnt_off0000ff3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 10708 bytes
SHA-256: 51c577f9485365043963a63e1048e512b553b4f35178478fa54fdf325f5850ac

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