Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c1b62a9b8326d7…

MALICIOUS

PDF

68.5 KB Created: 2021-02-12 02:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 47dfbe4453950a1ccc2a80a5ae5d8c76 SHA-1: 2b66a161842e66f49e9918bcb2b0c4ab35deaaf5 SHA-256: 31c1b62a9b8326d7f2b4cdc985f58f0b41dd577bc8c39535c9d0f981a119d311
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=electrolux+front+load+washer+manual+time+manager PDF link annotation
    • https://moxigowa.weebly.com/uploads/1/3/0/8/130814106/a61cba04e6.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/idgghcB/how_to_write_a_business_plan_template.pdfIn PDF document text
    • https://duwafozadujazak.weebly.com/uploads/1/3/1/3/131380008/1432642.pdfIn PDF document text
    • https://cdn.sqhk.co/jidobimatu/GLiijhp/46042856640.pdfIn PDF document text
    • https://cdn.sqhk.co/ligazupevu/i28jeLl/dry_ice_blasting_rental_minnesota.pdfIn PDF document text
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/mumepufa-fuxonejo.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/hrjj75Y/sling_airtv_mini_airtv_mini_review.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/1622450.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/xihjcC5/desenhos_para_colorir_masha_e_o_urso.pdfIn PDF document text
    • https://cdn.sqhk.co/dojoxuwote/hjBjhJk/wizukogenofewixekajereras.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/RjcoHFQ/limabibat.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/DeCgewe/stack_on_64_gun_safe_review.pdfIn PDF document text
    • https://cdn.sqhk.co/vopovaroxamo/1LA3gd1/23005721462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dadagax.epizy.com/38126399583.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/platform_7_physio.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/jumbling_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/metis_bootstrap_admin_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/can_you_pair_apple_watch_with_android.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_off0000cf41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF41 5552 bytes
SHA-256: 0294d2da894b607123ee0c991298fce09b16400bf1e4c0442c4d3f0c38ce2233
font_01_sfnt_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 10244 bytes
SHA-256: 1e00defaba21e6352d83be4a7677ca3dc56358944d1337ff1d7f38dc048b26e5