Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf01fe6089ee2a35…

MALICIOUS

PDF

85.5 KB Created: 2021-01-24 23:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 44a00a4db7aa96936fd58db01d1896c8 SHA-1: dbfdd87b475c5cb376796efe40132a1272ad221b SHA-256: cf01fe6089ee2a351f4d1a5008fcb534b9cd3d308bb1c587bb457188c0614338
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 0.9998

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://traffnew.ru/123?utm_term=macbook+pro+cyber+monday+2018 PDF link annotation
    • http://kidepokapila.22web.org/38491115262.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/dgjgcge/parkour_run_unblocked.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/zumavogagok-nolidoximalo-pebipubowopinu.pdfIn PDF document text
    • https://cdn.sqhk.co/xujuvotu/dTAaijz/barbie_granny_download_mod_apk.pdfIn PDF document text
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/136ca55978d66da.pdfIn PDF document text
    • http://mugafopame.iblogger.org/bimebuwogi.pdfIn PDF document text
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/99d86c98ec8d.pdfIn PDF document text
    • https://vakilonote.weebly.com/uploads/1/3/1/3/131382032/205667.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://tizepadeda.rf.gd/jikinenuliniwesepuwopaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/miss_sloane_movie_parents_guide.pdfIn PDF document text
    • http://javasuk.epizy.com/fiori_guidelines_flexible_column_layout.pdfIn PDF document text
    • http://legumanob.rf.gd/smadav_antivirus_2019_full_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/bubble_game_apps_for_android.pdfIn PDF document text
    • http://sawopigemon.epizy.com/18442196811.pdfIn PDF document text
    • http://dipulitexaxuz.epizy.com/armonicos_en_la_red_electrica.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/html_checkbox_form_submit_example.pdfIn PDF document text
    • http://ziradisam.rf.gd/31233859429.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/authority_letter_format.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_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 5840 bytes
SHA-256: 3b84908d4f90e4cbb101a71f6f4e677340b316d0240818cb901a73be22a8753a
font_01_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 11212 bytes
SHA-256: 94ecbdea53c4cb3512de13bd18c6f2f7e9d067ff76ca9641449bbe3f4dcf95f6
font_02_sfnt_off00012259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12259 11004 bytes
SHA-256: 86863c7198e544a2704236b9ac6da9b53307dd73937d90aa9bd7220e7b0d868a

Open this report in the interactive analyzer, or submit your own file for analysis.