Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea56d69dc0ec215…

MALICIOUS

PDF

83.6 KB Created: 2021-07-28 02:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: aae6df9b07b96299dc3cb29c997a3e1a SHA-1: aaeeae317b82e2603e5dcf33b12ab7376771015e SHA-256: 5ea56d69dc0ec21537b34f50caaa7d45c8b9190b824286ff69a1917017eaceec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These links are likely intended to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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 http://highendschmiede.de/highendfiles/file/84516310108.pdf In PDF document text
    • http://alianzablue.com/aym_image/files/kuzejulijalised.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/49191719969.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aacae41c129---25192086821.pdfIn PDF document text
    • http://parfumland.sk/upl/63145410827.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/faltp3e0ma693qo3sjkh8eklq6/30276869877.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/60bb8c94401fda3c0c4ae0fdc578f351/72522550884.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afeda005b6---nelananezejukatetodo.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/87c2be63768e094acbc3a203c7aaaea7/zigixanevara.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/85130323771.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/95737998270.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/bikusinizuba.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/gilotonafojit.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/guparugeseguporigadudi.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/sqbdielkeqhbfcsdgjpjrpqbb7/49920351811.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/noworanitanozigemam.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/berule.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c869979a7d---28819020358.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/losiva.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aaa937484704580d3b10562ae6d5eefa/47042231084.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/fikififimaduse.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/03cd8ffc048a6ac28d5533f6882edb4f/9824983243.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/guwugovogize.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/e47f3c2839570802028ad95e4ffd8686/99570926082.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=planeacion+de+la+entidad+donde+vivo+tercer+grado+bloque+3+lainitasPDF 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_off0000dee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE7 11172 bytes
SHA-256: 2c23a3bf2051432914551ac9d910522d39282ce04d5d24e15281e61330564a2d
font_01_sfnt_off0000f8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 18348 bytes
SHA-256: 286a3cb619df5c7cf6c62d768518401a0eb972169a055ac65695a44c33ea5753
font_02_sfnt_off0001279f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1