Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eac2b6c0dcce8d0…

MALICIOUS

PDF

75.7 KB Created: 2021-06-26 03:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57ccb8c2963416b4bbb31298e3a36453 SHA-1: 79f2a211ec2f6068fc7902809cc68d947f567d82 SHA-256: 0eac2b6c0dcce8d0b6d46c177a33d3e0fe0175154a6d7d8eea7568702c43c72e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lead users to phishing pages or further malware. No scripts were extracted, but the link farm and compromised CMS uploads are strong indicators of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://coretry.ru/uplcv?utm_term=the+patriot+eatery
    • https://beautyyaurient.com/editor_upload/file/xomowosazagonu.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/b12963f3fd10d770caf597e445c2d33e/53429163919.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/i396qpifrkv4pqbqi4ri31um1u/47141084527.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ge62oua6kk9bnq13d0r9qvq3ml/27250598111.pdf
    • http://emeraldoutback.com/clients/f/f6/f61299a274fa8fdb0c00f5b1ed511d42/File/gipur.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089131081cb2---78008984107.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/2a734eccf192bde0ab04a346943c5d4d/94531921483.pdf
    • http://primaneighbors.com/userimages/vetivixadelafatewiga.pdf
    • http://qianlong99.org/ckfinder/userfiles/files/95144560182.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/t3lcalsji3598srro544smannr/gedejotogoja.pdf
    • http://10glazsikeyrosa.ru/file/mewupotodujag.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7ba99cf0d---xuzudizizax.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/0957e07e62ebf2548e02e04ec94f0ebb/mugixur.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e624711a44---97225359165.pdf
    • https://dolmalatrek.com/userfiles/file/josanopilogaxusotemelule.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/ailtut3lpcuas8255c4jb8i83d/38880985031.pdf
    • https://immo-cjeanpaul.lu/userfiles/files/matagiz.pdf
    • http://accronline.com/userfiles/file/68888781662.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4fd3f0960---zosaton.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba92825fc19---tadawupelemipuzorojew.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/208b900aca3ffd47b06b406672445f64/91126044149.pdf
    • https://gamaconsultores.cl/upload/file/duzilejolodel.pdf
    • http://sjar-tech.com/uploadfile/file///2021060103430166.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c691.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC691 16792 bytes
font_01_sfnt_off0000dea3.bin
089e216914d6804027f687e0fb62d6976459404aeba099beb1922cfec5bf7598
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA3 16952 bytes
font_02_sfnt_off00010ad7.bin
ff19b8ca7a307e689e17ba78401f8cc34095ac524d2af3cc15fc082b8659f6bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD7 10108 bytes