Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fd40ba222fd4ab…

MALICIOUS

PDF

75.0 KB Created: 2021-03-27 21:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cd295aff2e2f183603fa496c5d7e12f3 SHA-1: 5b1a2cca478b5f08fbc671d4015abcdc1f3d1289 SHA-256: 38fd40ba222fd4ab2b6929a64951610d4783f2a128de0a1025c886ede285e423
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=philips+airfryer+manual+hd9240 PDF link annotation
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_60117962ab050.pdfIn PDF document text
    • https://sekugiwa.weebly.com/uploads/1/3/0/7/130739582/kuvumaxibo_sijufoti_bapedetur_fawin.pdfIn PDF document text
    • https://rifelejoxew.weebly.com/uploads/1/3/4/3/134330737/ratukigadokowez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_5fcfb7e58b733.pdfIn PDF document text
    • http://resimpub.com/33950472104lc52o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_602f4bcce450e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446633/normal_6002f1098ad17.pdfIn PDF document text
    • http://mon-compte-cmb.best/television_interview_script_formatwj6b0.pdfIn PDF document text
    • http://menbp.online/88528009194tv0dr.pdfIn PDF document text
    • http://wegansit.space/how_long_can_dog_live_with_arthritiszwz2o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371004/normal_5fcedc611895f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_6009df7400e9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/gateme/how_to_do_cursive_writing_on_cricut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e7ee162-9251-412a-89f0-dd81a9e54d82/epson_wf-7520_ink_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/idrivesafely_answers_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa73c54-0cd9-4169-82ad-2fc5dad73ddc/59750920787.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/wobiwuxakokudoxaxano.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/bssid_android_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35085798-aa19-4ad3-9471-d6101372e68d/financial_algebra_workbook_3-1_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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 5904 bytes
SHA-256: 70516ef144fba9645563e51b8ea636696d30e9a64fa0b7d9e734bb81329deeac
font_01_sfnt_off0000e935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE935 6096 bytes
SHA-256: c54f866859884b7dc4c680f070aced73c88026432d388f4e3a3dd97e9723967a
font_02_sfnt_off0000f8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E6 10516 bytes
SHA-256: 3e3873acde2cadbaa900dc488f17fc1a73befb0dff23c3b89c0511364962f18f