Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe3aa5452c0e570…

MALICIOUS

PDF

86.8 KB Created: 2021-05-06 20:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cfb3700a70cefeb64472180aa11fee9a SHA-1: 74f12223d15fcb924d9bc0761925891b029beba5 SHA-256: dbe3aa5452c0e570f505f504c0aef2995f31ea1bd65c0bb4abc97850ab9a2895
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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
  • 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://maypoin.ru/strik?utm_term=most+common+cause+of+death+in+thermal+burns PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468838/normal_606c3f7c00b28.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/short_guide_to_writing_about_biology_8th_edition_freewy5me.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/learn_english_speaking_through_kannada_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414867/normal_5fdafe164cff4.pdfIn PDF document text
    • http://neo-tp.ru/1877948540987q7y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_6024b6ec3abab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417128/normal_6061e9c12a71c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493920/normal_601dbaf521f36.pdfIn PDF document text
    • http://nevidulipegu.22web.org/bapererovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408721/normal_604d79c18d4ec.pdfIn PDF document text
    • http://trenketo.buzz/dixie_chopper_silver_eagle_owners_manualt81vg.pdfIn PDF document text
    • http://prodson.fun/gujozumdj94u.pdfIn PDF document text
    • http://myyshooop227.site/95330290576gpqwl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444113/normal_603a605f40968.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c91bdb48-c041-4f27-8a08-ae4ce4a68ef5/fofipubavonasiwofof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c22b1a-3925-4a17-9b75-f41fc8055769/watch_pride_and_prejudice_2005_online_free_streaming.pdfIn PDF document text
    • http://zosujudete.epizy.com/medicinal_plants_in_tamilnadu.pdfIn PDF document text
    • http://bepibuxel.epizy.com/flight_stability_and_automatic_control_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a35b614-a9ae-489f-9253-8e61faf22e8e/dodevujusizuwokapowob.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/89701040088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1923862a-a701-435d-9c84-ddf19429d909/buwibosofuzejajur.pdfIn PDF document text
    • http://fufinekudag.epizy.com/aashiqui_2_video_full_hd_song.pdfIn PDF document text
    • http://lazubag.epizy.com/factoring_perfect_square_trinomials_guided_notes.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_off000105dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 5288 bytes
SHA-256: bf5ba5f9538ee357b673242bf1c98df3a12e5cdacdfc9d6f3b3c63aebede447f
font_01_sfnt_off000117a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A7 12040 bytes
SHA-256: 032ab0f688c7e1333f75044b99831cb79119b754630cc0f2aa4bc1d93505ed44
font_02_sfnt_off00013f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F60 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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