Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab0898b604a989e…

MALICIOUS

PDF

74.1 KB Created: 2021-09-07 04:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2c12364b3a1b0e026719d537a9b7d8ef SHA-1: 62934b68641a321733fda4a9734f510e987a68d2 SHA-256: aab0898b604a989ec2008e91ab8a6ed2c43915a14ebf2d66f62fe6d88ca59e08
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user engagement with potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pixomot.ru/uplcv?utm_term=mediterranean+diet+recipes+for+weight+loss+pdf PDF link annotation
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/69schq4n7usdf6b06914munq0s/bumimuwonamujabetogumame.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/54273094085.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/37920343186.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/9e5278c7b4084bd022499d8c3bfbe90f/jikojatipitegi.pdfIn PDF document text
    • https://campermagazine.tv/public/file/tuwanerimit.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/47575774001.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/guworufimufarawewus.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/nijubalipilevumatibivo.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b64a8524ae---99560379208.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/skfp4cguaa5unfuhcasaiphl18/22657336420.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/jotenefitiwet.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/xijufotaxovesepokumekiz.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b67d70dc4---nenezogetidapuwesutup.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/difhk4j9k7ul82cpjo19rlqok5/64370576900.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/ruxefa.pdfIn PDF document text
    • https://mashura.co/userfiles/files/50239265396.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/jilimu.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/luxubujabobofesuxavanawig.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087527f79fda---55260684366.pdfIn PDF document text
    • https://aksusu.com/upload/files/62595727523.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/6953332410.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/3bcd72d746d16b405fd096319fadfee3/19107684645.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/5kdtg40ug9a7rlkidqbcbmi2ki/95829990844.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78B 16172 bytes
SHA-256: 784534ab211c78d701d838195cfc1a43e4eb0c1a69749e02edbb3879dc4ba04b
font_02_sfnt_off00010125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10125 10976 bytes
SHA-256: 95b22c35536b9da430a3665b8dde974e233195fe48780e04987975ac71950203

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