Malicious PDF — malware analysis report

Static analysis result for SHA-256 3205271ae4c12593…

MALICIOUS

PDF

86.3 KB Created: 2021-09-24 06:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4ca9843c8e30924b04be8b0b2822ea55 SHA-1: 6d8d52a3ffeeb3b2bd5798deab3bd443f8eb45b1 SHA-256: 3205271ae4c12593e06d6963f81eb42ca79d89a37c268bc572a1c1c1b96c51d2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, with a high ML classifier score and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's purpose is to direct users to a collection of links, likely for malicious purposes such as phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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 http://vmkmsz.hu/userfiles/file/losofigokixepaj.pdf In PDF document text
    • https://mannoorpally.com/uploads/file/wipavofonu.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/093abfb964def6a7190190108946d767/69584249490.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/bemak.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/files/bibojunawujufifexexof.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/xelesanugoko.pdfIn PDF document text
    • http://worshipedia.net/sites/default/files/file/31486959916.pdfIn PDF document text
    • https://gulamanis.com/contents/files/1578484349.pdfIn PDF document text
    • http://delve-cr.com/uploads/tazegamarugigisegufuji.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/3762255863.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/67352341623.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/topudujes.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/xesuvoretimirikexiwubol.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/57150085895.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/waxovaxarasewimir.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/getogudovi.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/runamimuvowenonusixoxopap.pdfIn PDF document text
    • https://yauspeshen.com/ckfinder/userfiles/files/43029975822.pdfIn PDF document text
    • http://princeverma.in/uploads/files/86521711283.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1631903214.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d616ba2388---4755199216.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/fipevamusajabodalixib.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/nipoj.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/zugumijulifezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=textnow+premium+account+free+2021PDF link annotation
    • https://mediacentre.aerlingus.com/js/ckfinder/userfiles/files/varisewenozududifagaxu.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_off0000ea3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3E 10972 bytes
SHA-256: 66bcd23eac6179fcfdc037c5dbd62a8a1745fafc7b95f683c9dbbe0c99bc3c8f
font_01_sfnt_off000103dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DC 18252 bytes
SHA-256: e9d70584f37813e474cef2b9fab498086d8d6ce71e72fb6ec243204a4616953a
font_02_sfnt_off0001332b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1