Malicious PDF — malware analysis report

Static analysis result for SHA-256 6604d80fbd084419…

MALICIOUS

PDF

78.5 KB Created: 2021-03-09 03:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27bc59e62407a43abfde88d5a4d2f81b SHA-1: 59cd7381b3c134eecdbc4d1480f00d07809015fc SHA-256: 6604d80fbd084419f79994bb4c384afd528b687abc7e3ffd048151cd40a5faea
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 0.9998

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
  • 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://jottigo.ru/strik?utm_term=what+is+a+patient+care+delivery+system PDF link annotation
    • http://wozilimesiz.mypressonline.com/dda_building_bye_laws_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/hjjYghh/dice_tower_cruise_review.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/proof_of_taylors_theorem_with_integral_remainder.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/icuhegj/bell_212_helicopter_specifications.pdfIn PDF document text
    • https://resusogid.weebly.com/uploads/1/3/5/3/135346187/8939069.pdfIn PDF document text
    • https://fojaloda.weebly.com/uploads/1/3/0/7/130776233/7f2a1c427ed168d.pdfIn PDF document text
    • http://ranupila.mywebcommunity.org/how_to_program_steering_wheel_controls_pioneer.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/sodibilofi.pdfIn PDF document text
    • http://nesegejisivinu.medianewsonline.com/liviwiruleramage.pdfIn PDF document text
    • http://digovin.getenjoyment.net/how_to_use_light_pad.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/alto_sax_christmas_songs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_c24f1eab768b4200b30713aa8f378367.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc740cb-332b-458e-9b15-1bbdb80e50da/algebra_de_baldor_precio_panamericana.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_cda2893998864595ab041b40d852a527.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fbf8a1b-dc5e-4f2c-9218-f9bb8a600359/defuvekose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea719d0-1d04-4478-9b5d-a12c498d193d/7570043422.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/44565637473.pdfIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_946f1fb44c8a40db8e91f4c2cfc6a9a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e436d66-ad0e-423a-abcd-09155872cf00/5948790620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b00b1ee-6075-496d-85e5-702fb90eb6e9/65825804863.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_off0000f61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61D 5488 bytes
SHA-256: 4452bff1123e1a3a43d6f844cd8ee3053b423f1d4d29d27e7f0a97c9344204d6
font_01_sfnt_off000108af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AF 10580 bytes
SHA-256: 00ff89f76298bf49dc399695328b261b658b97042cf27471a45b7cf20e44da62

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