Malicious PDF — malware analysis report

Static analysis result for SHA-256 9768b885531e63ad…

MALICIOUS

PDF

75.7 KB Created: 2021-03-15 16:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 514c106579a3cc66f2a672e0c518690c SHA-1: 81bf908fbf730139decbf2986e1dee3edca48a22 SHA-256: 9768b885531e63ad06f1f2c9846318376cfca4ac8ee4c3e2a5ad03780c6b92d0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://lozipotod.ru/wix?keyword=gizmo+student+exploration+cell+types+answer+key+pdf PDF link annotation
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/61f3afe59663b5.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/monster_inc_2_characters.pdfIn PDF document text
    • http://mon-cmb.best/cantonese_text_to_speech_androidy9j16.pdfIn PDF document text
    • http://vonoxafaku.scienceontheweb.net/85312475780.pdfIn PDF document text
    • https://dejatenuti.weebly.com/uploads/1/3/5/3/135348415/5458861.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/telen.pdfIn PDF document text
    • http://pubopogebam.22web.org/gugizitudulisulugena.pdfIn PDF document text
    • https://domenotupeloli.weebly.com/uploads/1/3/4/6/134685365/7056919.pdfIn PDF document text
    • http://runmasten.online/komipeligobabalanub3l82u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2e65b96c-dbd1-4b94-a667-a3d22befaa3e/lifadusunoraburonetar.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/2004_mercury_25_hp_2_stroke_water_pump_kit.pdfIn PDF document text
    • http://kimejuj.rf.gd/sample_reporter_interview_questions.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/satitewaboxata.pdfIn PDF document text
    • http://bokawevetejap.atwebpages.com/gametogenesis_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1eebeca-f011-40c1-9c47-61890d1ca4a4/votugakobobewefem.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/65816677040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd79bbc4-2ff1-4e62-92f5-4c7915c07949/falcon_4.0_bms_4.33_system_requirements.pdfIn PDF document text
    • http://xoroniwogogo.rf.gd/2451838859.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBA 5588 bytes
SHA-256: 912340de3982f1a00acef4defb10c0bfcc8b05fe62fe3f67c8dc932033e46f29
font_01_sfnt_off0000eecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 10668 bytes
SHA-256: 467f4526c98be39cec77fffee1923312e4c8d120f0172185758f2e82e5c2d718
font_02_sfnt_off0001132e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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