Malicious PDF — malware analysis report

Static analysis result for SHA-256 3272dbef0373ffab…

MALICIOUS

PDF

84.5 KB Created: 2021-09-05 16:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b71a49df2368c4f3b9da308237364aa8 SHA-1: 097befc04a9230156476ec54170daff1d22cda5f SHA-256: 3272dbef0373ffab20397947df060264c136ef54bf4cebd91bbd089e4c0e54f8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs, many of which point to compromised WordPress upload directories or disposable hosting, forming a link farm. This suggests the document's primary purpose is to lure users into clicking these links, potentially leading to further malicious content or downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d3a1a6057---50015097874.pdf In PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160980f33b4d80---7535991310.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa69736634---jobaxunizujironajuv.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/af4b1e2f3c7a1ce4eba1b5f804ca664e/jiredanopejeg.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/jodowazebufajegufikuwi.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/84027993523.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/16925290951.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/48551519741.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f79fcb6c457---tejamenudikiwoweliliga.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/mutopuxosisijesezun.pdfIn PDF document text
    • https://ladangmimpi2.com/contents//files/dadajugul.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911a332c494---68341428780.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b22159f7---64802379513.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/otj3h4trf2o8d7cmhgj4p5b7j6/93028029984.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/19442484137.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d52fc6da16---49178949335.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/xutetipisitudaxalise.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/nugamiru.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/wubajofakivozisin.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/i1qa0pufhdktujbbsrijd7fr24/23569405675.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/bogigexar.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/64325566498.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123835b92030---berexexalunexak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ridurre+pdf+con+acrobatPDF 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_off0000e70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70C 17492 bytes
SHA-256: 8dd0ed410416db8402f32b1cc66280fdcfd19dbc837ef46804a54d1c30a49f2d
font_01_sfnt_off000114a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A7 10684 bytes
SHA-256: 93fa1acfbead2e9e9d40df90d95744e38c5af6d789680cc534acd0b31cff39c4
font_02_sfnt_off00012d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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