Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dac1455e3729843…

MALICIOUS

PDF

93.1 KB Created: 2021-03-30 18:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2babc7b88b90a022536356d002b73acf SHA-1: 11508c03df1af8a2cfd4a493e36f75511a62ee02 SHA-256: 3dac1455e3729843f1c1e61e25b9803a59822a3cc9d4ab40ca2f3263436ac6fe
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=dell+optiplex+390+motherboard+size PDF link annotation
    • http://bixaxivajujojar.mypressonline.com/how_to_program_dsc_keypad_zone.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/firadi.pdfIn PDF document text
    • https://cdn.sqhk.co/pobefozo/jaigH3t/72870453470.pdfIn PDF document text
    • https://cdn.sqhk.co/lovaxixifew/dn9acgc/54078193260.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxiteparam/iiCGXij/ugc_net_exam_date_sheet.pdfIn PDF document text
    • http://zedakobogesa.mypressonline.com/43974772170.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/dIgdicZ/mount_rushmore_halloween.pdfIn PDF document text
    • http://nipijapogila.sportsontheweb.net/aneurisma_cerebral_y_embarazo.pdfIn PDF document text
    • http://niginotan.22web.org/80887541410.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/psychrometric_chart_problems.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/genedesowul/tegewutoselukugibisufuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef9947e-236e-46b9-afec-3496c0f552cf/how_to_pair_vivitar_bluetooth_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd4f859-8acc-4e7e-a1f3-a85e9e931664/problemas_de_porcentajes_sexto_de_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f81a21a-c025-4fc3-ac50-5947c80c531d/the_wind_in_the_willows_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/96287587025.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/microsoft_powerpoint_2013_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51d96b1-b4aa-4acd-8201-3f7a75011b81/aprender_ingles_gratis_facil.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/watobamewogivizol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987257e1-5c83-4716-9551-b9ddb9f68217/html5_canvas_text_color.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2618c7c0-22e2-44df-8ffc-6f682c991134/yakama_nation_enrollment_number.pdfIn PDF document text
    • http://jonukufazok.rf.gd/vazijanoxitarimogat.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/kemudunilu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D92 5920 bytes
SHA-256: bcd5af3d13a2b307fdd66b7f3e660b5bc93c88a26bf72e502a05358854103ef5
font_01_sfnt_off0001318d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318D 22480 bytes
SHA-256: 17dd4ab8ea9b2bf6cb080e09f82920e433decd15aa1fb54717b1d2d535a8e143

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