Malicious PDF — malware analysis report

Static analysis result for SHA-256 4732f63887d8dd03…

MALICIOUS

PDF

71.6 KB Created: 2021-03-03 02:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5da3e2a599e051311e7cf37c44e973e7 SHA-1: 7c390e1a5f521456dac03dde5d536b5c6e55d721 SHA-256: 4732f63887d8dd03992e36d7518c2bc35707229095912b7ef4611c3c17608f07
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=heath+zenith+motion+sensor+light+flashing PDF link annotation
    • https://cdn.sqhk.co/vixukose/uXThaKI/lovecraft_country_book.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/gihehbS/matchington_mansion_ad_misleading.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/uk6ojiM/jefusajugukurizo.pdfIn PDF document text
    • https://wibakaxidame.weebly.com/uploads/1/3/2/7/132741334/b70fa71620.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/ZhdMnhd/directv_contact_number_customer_service.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/jjgdghv/neweveruxavakujemusinib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_60137d2d6cd7d.pdfIn PDF document text
    • https://rixatesar.weebly.com/uploads/1/3/1/8/131871899/3536948.pdfIn PDF document text
    • https://mirajaxudedina.weebly.com/uploads/1/3/0/7/130775596/56dc9.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/hdTWOol/nuts_and_bolts_motorcycle_art.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/jfhfkF2/las_vegas_slot_machine_games_free.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/kafises/modern_calligraphy_script_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/widezaroluxofab.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/93259570111.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBD 5192 bytes
SHA-256: 9b464855d5f6a067884f1b9261e17facd102f37fd769b0ca476418dbd5b8abf9
font_01_sfnt_off0000ee44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 10340 bytes
SHA-256: 543602eb5e05b347dc0cc663871c883537bce9ad616c57095883e6d8be5bf48e