Malicious PDF — malware analysis report

Static analysis result for SHA-256 394d1cd980ea1507…

MALICIOUS

PDF

76.4 KB Created: 2021-02-21 16:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9c7b3fbe698450a02a016926dac9523d SHA-1: 848664104ea3727e8f410fd3c89abf29f1544838 SHA-256: 394d1cd980ea150742b6e7150bb843c83d4ac2df75ae3f33359df43751d325ee
134 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The presence of a 'download button' lure further suggests an attempt to trick users into interacting with these links. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/123?utm_term=turtle+beach+stealth+500p+setup+ps4 PDF link annotation
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/vosogejegi_jeviwar_vasixe_pugoto.pdfIn PDF document text
    • https://dodukitomot.weebly.com/uploads/1/3/1/4/131407143/7483710.pdfIn PDF document text
    • https://mafaredoli.weebly.com/uploads/1/3/2/6/132695491/38a1a259.pdfIn PDF document text
    • http://kakakuler.iblogger.org/mcheyne_reading_plan_printable.pdfIn PDF document text
    • https://meripowubizaj.weebly.com/uploads/1/3/5/9/135959363/d3c9f053e.pdfIn PDF document text
    • http://todayshop.website/rupevimaudzho.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/42e68a6414.pdfIn PDF document text
    • https://nosuxiseliv.weebly.com/uploads/1/3/4/5/134578333/8a1821c2a4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495262/normal_5fffde87ba21b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5ff0a2b121fad.pdfIn PDF document text
    • https://megidawuxuta.weebly.com/uploads/1/3/4/7/134729580/6846268.pdfIn PDF document text
    • http://euroshopme.site/how_to_charge_stanley_fatmax_lightj0h4u.pdfIn PDF document text
    • https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/7cce798c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421970/normal_60265c19baf5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5fd8fc422b4d2.pdfIn PDF document text
    • https://wurokilusonopos.weebly.com/uploads/1/3/5/3/135345649/xovanonoxogubofosodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafovam.epizy.com/54660430319.pdfIn PDF document text
    • http://loluwoje.epizy.com/8424892929.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/pieces_of_information_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/vidulusogesadivikezevafal.pdfIn PDF document text
    • http://tinuzutajalik.epizy.com/23605222429.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_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 5464 bytes
SHA-256: 0066ce43e2388f113824cec1983672af1f6bffe156db92490098345920bff205
font_01_sfnt_off0000fd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 11376 bytes
SHA-256: fb7aa90eccf43e21a6354c7a6a21f196e901c7ca47240f6d854f643a968090fe

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