Malicious PDF — malware analysis report

Static analysis result for SHA-256 651fa62bb3d0d8bb…

MALICIOUS

PDF

226.9 KB Created: 2021-06-28 06:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c70347e22fbcb1046175a070a333f4d8 SHA-1: 319ad11e0defb7ee25a6d2541bc42ddf197aaae6 SHA-256: 651fa62bb3d0d8bba7fef0770303bb35c06bde3bb118f9a4e5ff5cf131b7e59d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam, likely intended to trick users into believing they have won a prize or are due a large sum of money. The document contains multiple external links, many of which point to compromised WordPress upload directories, suggesting a distribution method for further malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8156

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=insults+that+start+with+w PDF link annotation
    • http://acecaalcoy.com/userfiles/file/jonewuf.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ce8b530dd26---9161978664.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c182b28ca---xunuxebori.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/22167766109.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/90963211715.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/60565796457.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b85ea5b6fa78de6273f3d3b247f0ccaa/pivoxuzuzuxopixowi.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/wowagoki.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16097544b0afbc---xanafokomijugoxubalol.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/8272084b8d732de31adae344bf9ae46e/rogibeminudasatazit.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f10c40613b---82725044358.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/2bd8471996f8df3d104f1661b4d67652/45710712191.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/15cb7a80951f6d4cba62be30c4c150bc/53934080994.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609197d7f018b---46225892008.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/zadojek.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160705e87a0066---41733741138.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b616a37bd9e---xonowatamuruvuzisupodalit.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d6278c8fb---18820429194.pdfIn PDF document text
    • http://djpress.pl/Image/files/80418232275.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e3464cb01---xetebebeme.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/a6c3bd74f75c1432400fbba26152223a/29511582877.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961f8e8f5a5---vesozoruvonavudaluk.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/2c8cd8dc9134d3bef984a6bd57a63bef/27187358360.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/6jf4q9b872bll0893l444vt2t4/72283966114.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0002c44d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C44D 24268 bytes
SHA-256: d9afd9d4c5631b60fe9e2601feb8285fb0079f4952e8da4d3694cd1d7677617b
font_01_sfnt_off0002f15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F15E 10088 bytes
SHA-256: 644d37a9ff1314f5dbafa44a33ca8b07fbaedf9fd27e5fdb10cee095f32044d7
font_02_sfnt_off000307bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307BD 7312 bytes
SHA-256: ea335d2fe0170c78f2afec027f8567282fdbc8110bd4a4dbfd221189c9ad1982
font_03_sfnt_off00032066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32066 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00033878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33878 29984 bytes
SHA-256: cad4aaf34b1efe8f9cf3f3bd510a64856d8a084ae6f50bc0a3495aedaf34ab09

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