Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef97c515d2c69970…

MALICIOUS

PDF

70.0 KB Created: 2021-02-22 02:00:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 746bfbb28bb655eedc370097ece4ff66 SHA-1: 77b54349386da114834f2039a8fe1ca656e19712 SHA-256: ef97c515d2c699708ed60910a566bcb4a72d9becd6d14a47f03bbb1e06a96cff
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, identified as a link farm, with many pointing to disposable hosting services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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://druttle.ru/123?utm_term=bodega+dreams+round+3+quotes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413575/normal_5ff29232278d8.pdfIn PDF document text
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/9596591.pdfIn PDF document text
    • http://ejqy.com/salarasufogeqshd.pdfIn PDF document text
    • https://wosumugip.weebly.com/uploads/1/3/4/8/134867897/8256858.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/nuwunurumediziluten.pdfIn PDF document text
    • https://lalinixew.weebly.com/uploads/1/3/4/2/134265361/68f71.pdfIn PDF document text
    • http://devgame.design/atomic_physics_igcse_notest327f.pdfIn PDF document text
    • http://iuts.space/how_long_do_kenmore_washers_lastcqj13.pdfIn PDF document text
    • https://zinenefubodejig.weebly.com/uploads/1/3/4/3/134338026/fonozulafegarajom.pdfIn PDF document text
    • https://donoreto.weebly.com/uploads/1/3/0/9/130969624/daluguse_lodanuve_zejijotabiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_5fd9ced01863a.pdfIn PDF document text
    • http://chambreapp.xyz/apostolado_marianoaeqc6.pdfIn PDF document text
    • http://habercigo.com/ego_select_cut_lawn_mower_manualhgni2.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/tevobujaj_jafamukadot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fididebezewigex.epizy.com/69129348347.pdfIn PDF document text
    • http://pamakejexo.epizy.com/accounting_vocabulary_list_with_definitions.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_off0000d56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56A 5452 bytes
SHA-256: 756103ad2556e5085517937d3768ea01ba4df785b3cb5ad031d52db736cd1208
font_01_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 10264 bytes
SHA-256: 67e0a2b9ea80e22d1bf21463ef0796e8c0803d7546f760884b317c87abda10a3

Open this report in the interactive analyzer, or submit your own file for analysis.