Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea584e8ae500ed47…

MALICIOUS

PDF

74.6 KB Created: 2021-03-07 13:19:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 61607f1938934ebc9af8ae1d541e46f6 SHA-1: 0ef68a858a5eecbdb45c60a44f4bc9009397d212 SHA-256: ea584e8ae500ed47805b63a4a97e92f0acc7043ff3a0b879a4ffc464ae7df66a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm with numerous external URLs, many pointing to disposable hosting, suggesting a phishing or SEO manipulation scheme. The document body, though heavily obfuscated, contains text related to water properties, likely a lure to disguise the malicious intent.

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.
  • 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://lozipotod.ru/aws?utm_term=why+is+this+property+of+water+so+important+to+life+on+earth PDF link annotation
    • https://nobokoxevukaj.weebly.com/uploads/1/3/4/7/134755509/fb133.pdfIn PDF document text
    • https://tusigidufamem.weebly.com/uploads/1/3/5/3/135350313/6888054.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://povasapodojika.epizy.com/broken_status_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07cad7cd-2ccf-4892-b365-759d6cf71b9d/2020_nma_poker_run_schedule.pdfIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_86c883cb47084b389b183416d3d7008e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/666fcfd4-57fc-4650-a0b9-bc3c46f572bf/evergo_respironics_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93de4b15-5447-4360-9d56-d8a8bae91954/94272458825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440a9f5d-67d3-46fb-ac08-fdddc191a3b6/zevuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5477c0c-86ef-483e-a127-f9af7b36a959/hoover_windtunnel_3_channels_of_suction_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/dole_bwc_registration_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5afa867-efb0-4ac3-a12c-d6af0130caf4/ririwavarifusumav.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/90068642581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b252608-b85c-41af-bbaa-a8e3fb36a888/lawn_boy_lawn_mower_parts_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/galojidol.pdfIn PDF document text
    • http://vobogiv.rf.gd/inconformista_sinonimos_y_antonimos.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_9da24ff3c90d401583fd032012bd39c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ab5b9b-f37b-4066-88ea-dde45abdb8ea/jofodo.pdfIn PDF document text
    • http://gegavolaful.epizy.com/bamul.pdfIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_bd1a94e8bb174267982d8cfb8393a945.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b3e477-55ab-4bf3-9285-f0d24cb384cf/how_to_heat_up_tortillas_for_street_tacos.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_off0000e66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66E 5348 bytes
SHA-256: 23ed1fe90c30c876940d75b6f5c646e95c98e33ed4c899a1e9e774cd894fc18b
font_01_sfnt_off0000f893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF893 10596 bytes
SHA-256: 8a0862c903c829758a165c8855276da424eb68278a848e8b925d9c9d82d5307a