Malicious PDF — malware analysis report

Static analysis result for SHA-256 beedc75ec140c244…

MALICIOUS

PDF

71.9 KB Created: 2021-05-18 21:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dc2dd47dac17f84c2bd73e89f4e7b618 SHA-1: c7e41f3d2e76649afcf64ca3d81b8f54bcd26941 SHA-256: beedc75ec140c24448cb9a5d47e65a88c125756cc890e2c02b92d5c77e8be56f
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a malicious redirector and a phishing lure, specifically targeting users with an "evaluation" theme. The embedded URL `https://crophysi.ru/strik?utm_term=evaluation+nombre+relatif+5eme+avec+correction` is identified as a malicious redirector. While no scripts were explicitly extracted, the nature of the heuristics and the embedded URL strongly suggest an attempt to redirect the user to a malicious site for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=evaluation+nombre+relatif+5eme+avec+correction In PDF document text
    • https://static.s123-cdn-static.com/uploads/4452171/normal_5fe50c4d65ab8.pdfIn PDF document text
    • http://viwowiziboso.22web.org/the_magicians_season_5_netflix_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_604817e305c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_605b7fc54e57a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed87fcdc-1690-43d1-869c-8d1486079aa5/how_much_for_proofreading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed516da6-0505-4b34-9f59-5024be68757f/canon_rebel_xt_battery_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a43525-f53b-47c0-8f85-5bcdb3cb994f/that_hideous_strength_summary.pdfIn PDF document text
    • http://nosijatigatu.epizy.com/zubojulovipevezetur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17eb553c-43f7-43f7-8ccf-26bd4ee0ef33/18954170348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07f8b6f-a7fc-427d-9a87-02f477e2a7fb/triton_atmosphere_thickness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efc3530e-7f46-4099-bed9-3e8c1018c82a/what_are_the_4_categories_of_processes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46045211-a731-44c0-b262-1b7cb43c4300/27105768326.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/a_movie_songs_free_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132ca90b-db29-4d8c-b657-ae1291b0cc27/wadot.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/6671040016.pdfIn PDF document text
    • http://rabudigika.rf.gd/electronic_devices_and_amplifier_circuits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3840807-cbae-4738-8ea5-9c8792b1b3cd/perseus_and_medusa_story_video.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_off0000d8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A8 5128 bytes
SHA-256: 6acc8d4287ff5495617182ee46f3d6051f5e35d5b5a2c9edeece82b223a8dff0
font_01_sfnt_off0000ea1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1E 11700 bytes
SHA-256: eb4d5039bcaa9712fd2c4e3a628a4ba1fe53b4febb204af776c5978ecfd2f33f

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