Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cfe252d5089139…

MALICIOUS

PDF

83.0 KB Created: 2021-02-25 08:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c767fd9809ee42ba753e64c39b6d3ec SHA-1: 9b047ff28ac42b8bca00a660e4a49b2c68b309a3 SHA-256: 32cfe252d5089139b17e37f411c8a959a7555c7cbb962f63309d668cf57ae22a
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://druttle.ru/123?utm_term=the+tattooist+of+auschwitz+chapter+7+summary PDF link annotation
    • http://wifunagidoli.mypressonline.com/what_order_do_i_read_the_star_wars_books_in.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/how_much_does_it_cost_to_repair_a_catalytic_converter.pdfIn PDF document text
    • http://goshop32.site/10_frame_langstroth_beehive_plansn4z67.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/apc_back_ups_pro_550_review.pdfIn PDF document text
    • http://appletopshop.ru/90575461185nxrz6.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/a978bf1ae.pdfIn PDF document text
    • http://bestunew.xyz/lokal0q4x3.pdfIn PDF document text
    • http://reduslimer.website/pikekoberizororusibizaxav90qp.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/zidonos.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/vogemalomonuv_gipawitar_kuduni.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/rafujelij_vevugup_diwirefapimemol.pdfIn PDF document text
    • http://cmb-societe.com/free_printable_mailing_labels_templatesv2oxv.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/56374886148.pdfIn PDF document text
    • https://vuwugaletop.weebly.com/uploads/1/3/4/5/134588193/zujabopoxivu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/10354044083.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/headley_trust_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/sotabozo.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/call_of_duty_modern_warfare_maps.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000f710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF710 6548 bytes
SHA-256: 370b63e99b3bc2c1d8b7a2bfc1693e0257dccade0e64e814f912f9e1c3af29e8
font_01_sfnt_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 5496 bytes
SHA-256: 40f5048f88b301d0e110313c11e3915fd2fef4d71c4b58c50418b8c36faf2bbf
font_02_sfnt_off00011a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A17 10764 bytes
SHA-256: 0f3041c08632e996a8488f26bf7a39f91c8c72a9a155549471bf756f479de805

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