Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0aad290b10d710f…

MALICIOUS

PDF

80.1 KB Created: 2021-09-07 19:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 98b2056ada37f9a8592a975c62f64ec3 SHA-1: 6b885c5f3c81e636d1611425fac45c964f9c7d0d SHA-256: b0aad290b10d710f7856c96927b03130df1ee4e741f39a7fb5272f7fecab764e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs indicates a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/subisun.pdf In PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb6db12057e---jakatagonefa.pdfIn PDF document text
    • https://asken.as/bilder/file/tolebinukerunebe.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/pazosemakabejelirimiwesir.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/92f1e03fd2fd14900413ecae22c1bc69/53282462056.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/49166989631.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3da9050b80---5189340211.pdfIn PDF document text
    • http://tele-video.ru/upload/files/fuxapekumozusizobalolezos.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/3626796245.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/73421050691.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/50845759728.pdfIn PDF document text
    • https://virker-ikke.dk/files/dixujoridulotovemeso.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/nudovagisekeziwipijareku.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b15c2506356---pulutegibumok.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/ginodanuzenopusotezazo.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/sagixemeromifepile.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/62272028408.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/13923056497.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/dibolil.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/22226014100.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/vixonebe.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/diladarudakon.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c17fb9b0cfd---mafom.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f86a05a3e---mexumusaf.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607713303ad9d---sefexipibekajep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=manual+usuario+hyundai+santa+fe+2012PDF 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_off0000d491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 10952 bytes
SHA-256: aa410e63c07462ba4224c85a643aea9dd3b808ce4b9c3a6d44c0b729e396f450
font_02_sfnt_off00010610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10610 17092 bytes
SHA-256: cd54d840a77742531d93a53e20216985a50a46996a4502045dc03d7f198e556f