Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d0e3ad3b92deb7…

MALICIOUS

PDF

86.0 KB Created: 2021-03-03 23:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 07958487d46b2c4a5588da60b45cc560 SHA-1: 56d64786802d1c91a3f25c2b0d5b8703377c4019 SHA-256: 11d0e3ad3b92deb78bfe5d8356774d64627aa0773c9d242c8ba30b5736da9703
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content.

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.
  • 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://soxebez.ru/award?keyword=how+to+stay+safe+as+a+nurse PDF link annotation
    • https://kegotewu.weebly.com/uploads/1/3/1/4/131437679/6b31b.pdfIn PDF document text
    • http://girajepom.22web.org/alternative_response_hierarchy_models.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/pusaxakowasotosijujupaxo.pdfIn PDF document text
    • https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/jiwajizizovubom-pozomizakidimeg-fesuso-zalojugaw.pdfIn PDF document text
    • https://wotapidedodibi.weebly.com/uploads/1/3/4/4/134475573/vubenidujetonaf.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/39945444259.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/pugumanelave_rabidejirajuv.pdfIn PDF document text
    • https://nofefikow.weebly.com/uploads/1/3/4/5/134510094/3804520.pdfIn PDF document text
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/lamorogoza.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/vopunipozotumi.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/1021069.pdfIn PDF document text
    • http://ovca.space/camila_cabello_shameless_song_freeav3xs.pdfIn PDF document text
    • http://mmamba.ru/mivanizitiphj8j.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://s3.amazonaws.com/dejazuvorira/340324788.pdfIn PDF document text
    • http://buwozefavimim.epizy.com/attack_on_titan_2_inferno_mode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/silkroad_wizard_bard_build_guide.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/rivizilutek.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/i_love_you_dont_leave_me_song.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/does_xbox_360_live_still_work_2020.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_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 4720 bytes
SHA-256: 1ad5be68f558a5ac4a362b5fdb627f23ffd3afb65a54b1f7ddb8eacbdaf1783b
font_01_sfnt_off00011806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11806 10624 bytes
SHA-256: 0e0b36c2ade5b2e72580b9ed225a307e95a29b5ab5a5fe6aeb3ef7ef5322f254
font_02_sfnt_off00013c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C50 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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