Malicious PDF — malware analysis report

Static analysis result for SHA-256 013ba7d0b4f5b579…

MALICIOUS

PDF

95.4 KB Created: 2021-08-15 22:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4ef7d63c6a7e0acf4125c78cd2ab2e7d SHA-1: 32287381a4d79e13c218120992f2427e7c921435 SHA-256: 013ba7d0b4f5b579e3cdb66a9363413869cedcae8b54985fd197ac88165fd28c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm and uses a password-protected archive lure, suggesting it is designed to trick users into downloading a malicious payload. The embedded URLs and the heuristic firings indicate a phishing attempt, likely to distribute malware disguised as a software license key. No scripts were extracted, limiting the ability to determine the exact execution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://himalayanwanderer.com/himalayan/userfiles/files/41381472898.pdf In PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/mipujivetesorolozeno.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47156a7639---vozowotesufefu.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/93ede72ad49b7daead2d4c773bdd7959/kexonovinedulumose.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/kipupetaxezajagasolu.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffe3985ef7---lobupoxogopov.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c47c7851---94495254913.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/27510470656.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/c897f5e53ac4cd68c99504f92db988c6/mabibifitoris.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/nelebagenadobazufe.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099da12bb27a---88554441191.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/9528881161446b882684278b54d6edcd/dudibedokaxago.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/mewebuturavenatugenirifi.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/zagebezeligew.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2fe29cae6---38540383113.pdfIn PDF document text
    • http://goref.ru/files/file/46883233779.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/92953864628.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/40824751314.pdfIn PDF document text
    • http://dataprint.ie/uploads/file/tozoxudam.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/2358130415.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c3efaf3caa7f6f04f4f81d30a33428c0/77452588045.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/zigebofubedifupiruja.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/aohknmgjum01fuqnrmb5vvaa6f/rerixilebinatir.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16095d209dde7b---53961906774.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=clave+de+licencia+eset+nod32+hasta+2022+gratisPDF link annotation
    • 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_off00010b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001233b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233B 18596 bytes
SHA-256: 21beac04f6398dfbd375032f7d522de7877acfeb85e9b1049cb9dadbd664791f
font_02_sfnt_off00015308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15308 11160 bytes
SHA-256: c075f8a2b0752416130c28c6a446c21a96d0969e82c7e971bc602e36839cca6e

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