Malicious PDF — malware analysis report

Static analysis result for SHA-256 3048769b6da6d352…

MALICIOUS

PDF

86.2 KB Created: 2021-07-02 01:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45b551fb6427627c337be40b8aedf615 SHA-1: 43fd1b0a702af8345f13f5a772e94fb393eef9cd SHA-256: 3048769b6da6d352fa6502774499f9ea7ea9d8c759cfc51c95631c18c5dc7bfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. These links likely serve to redirect users to malicious content or phishing sites, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/4jk9fr5khrp9nu0tc207idnenb/zufepovawosedaxurezud.pdf
    • http://bhs-class1957.com/clients/35434/File/fisorepifapamefubovexekis.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb67638c1a---54522617746.pdf
    • https://keongracun.org/contents//files/37290054786.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807d02b1fba---31166721687.pdf
    • http://phuocthuan.vn/images/pic/file/94395530906.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f3ca18b5cfb694359b4b2254da861645/63680181544.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/d3002f6aeb4fffdcff59f13ffc567431/63213058399.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160719f6fdd8db---17624541212.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/52579762202.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a5cd2b8680a91d5248f3d3cc3d0c1131/vovak.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079092025aa4---mosijizofosijep.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/d60677799f8d0e95b68dbce956473229/6127693218.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607238ec70ca4---likajukipiro.pdf
    • https://nezrenweb.com/calisma2/files/uploads/puvazoguropumuduje.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8d307dc8a---83234011051.pdf
    • http://tecnoservizi.com/userfiles/files/85696654278.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/bfb494ccd034dbf9e655455de42afa2f/livijakatoz.pdf
    • https://tenshinorchids.com/FCKeditor_upload/file/51131558880.pdf
    • http://j1medical.com/uploaded/file/wurabuwodozivusuka.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/02e217bc891cffe86a5cb00966020cbd/69490184733.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/ppm7qv87ne3a18qtvc182g23b6/gogebexugu.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/5993fb19c8df48e71e51e5211b4e959b/wisuronazosodorusuneriwiv.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800dc032515---minamo.pdf
    • http://kasargod.net/uploads/file/vudix.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+formal+regions+are+located+in+the+western+hemisphere
    • 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_off0000ecbc.bin
6ceb87058c5bf09b2759d78685e2f31e090ede13eb171f198ef442ea8655ba44
pdf-font-stream PDF embedded font (sfnt) at offset 0xECBC 16348 bytes
font_01_sfnt_off00011707.bin
7cdd4afceb4dfe19a78d00ee8a74d311879cf289d5a14a81a4cd63b928c38d69
pdf-font-stream PDF embedded font (sfnt) at offset 0x11707 11148 bytes
font_02_sfnt_off000130c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130C4 16792 bytes