Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a9c953e93e5a4d…

MALICIOUS

PDF

84.6 KB Created: 2021-09-16 04:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 04cc4a6df93f5fd3f2188a878fb6884f SHA-1: 9fcd8d9a0c0f414d34889b50fdb8e7de3202fd8c SHA-256: e1a9c953e93e5a4d94f2c72104698d96f91b48ed547a39af55762f5d2b5dc603
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. This suggests the PDF's primary function is to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=lemmings+for+android PDF link annotation
    • http://1-sanya.com/blog_images/blog_/file/folopenonosepuvutafoga.pdfIn PDF document text
    • http://splogservice.ru/content/file/tibarizijirukak.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/47839570302.pdfIn PDF document text
    • http://fbrasil.com/userfiles/file///fulos.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6b1725a34---basutava.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/dimijopanogape.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/43570342781.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/57415303215.pdfIn PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/jozezirexajozewimafuzexun.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/tidenaguwukatumalibul.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc8e716e12---bibitiraga.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161408f13a1552---vunaxedokixisejedi.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/61140390885.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/sofofuzux.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f400225745---24720662553.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/f02bb21487adaf7fd12eac3556a7d3fe/47465487177.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/50246788822.pdfIn PDF document text
    • http://twilaw.com/files/files/33597907507.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/19024712899.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/sulapomofugojomixezixeb.pdfIn PDF document text
    • http://reopen911.info/media/file/tukinetikozez.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/85952329476.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/moxutezoz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81A 17300 bytes
SHA-256: f40f5672c67fbffa1b7bcd997afa50c8f73c6252db0e1bd60cfb27c8a97fe18f
font_01_sfnt_off00011508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1F 10512 bytes
SHA-256: 5fe78bcc300e0bdc17192692f00588622b7b4d9b86f120352371673f3a8a7fad

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