Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49bf1b0ea799228…

MALICIOUS

PDF

76.9 KB Created: 2021-09-04 10:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 68ffae2f177770a20269ec186628880c SHA-1: be84d4b24c2a50b2cbfd0de43286d1c00e37a228 SHA-256: b49bf1b0ea7992289aadd35e7c3524af0a7342ae4e742deb44a0111483474167
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. It functions as a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that this document is part of a scheme to generate traffic or distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://najlepsze-w-polsce.pl/uploads/panajedotegakozovixuro.pdf In PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/81541287429.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/zobigoretev.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/sepup.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/joraxi.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/surebejipitef.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/jowoloparedatubex.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/27475164374.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/51508373084.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/xexal.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/91473125398.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe925e46e5---xukedagam.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/pafemarepapagomezozas.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/vupareboxotorewofokaxo.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609966b45abb6---tixomuresiguxatalakazew.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/zuvidupujadikugagotiveji.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/xedim.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/93840172173.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/3754469440.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/03f8d761f3d5accc66add76077fb6331/botejoguvefusawonadoj.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/11915002553.pdfIn PDF document text
    • https://ecole-anglais.com/upload/files/keroferezubesivulono.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/408a5eef1af87a2f76b92bbd75fb2af3/resepe.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26fd230da9---pixazufarozoluwijat.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b522966c74---vesavebodiwubovujajuke.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612c59c5026d6---16620993000.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/50064669718.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=rhapsody+in+blue+guitar+duo+pdfPDF 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_off0000bd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 20644 bytes
SHA-256: 376b731fb458b0c4d507e2835217727acfd1b12d5809ea3a459c5de852618cd8
font_02_sfnt_off00010bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD2 11176 bytes
SHA-256: be31ca31f810e9e8913a163b5c7174d06afd0b7c81ca2c1d3a413d643fe78f18

Open this report in the interactive analyzer, or submit your own file for analysis.