Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0199eac1f6f323…

MALICIOUS

PDF

112.1 KB Created: 2021-07-22 21:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e3ae89463f415fae4ee202087538ab16 SHA-1: 167709b41835f1f6984c3d0ba741a1cd92b08fa8 SHA-256: 1e0199eac1f6f3234748532a39fc2296c15e635264f5dc5b708c10ca4ff2348b
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detection and ML classification strongly suggest malicious intent. The presence of multiple external URIs and link farm heuristics points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/s8r3r59r50msfb5gt2dfjq7su3/8471568576.pdf In PDF document text
    • https://an-professional.ru/img/files/file/kuxizugiz.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f44cc69d8f9---zutomaxun.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/ramujivedafesero.pdfIn PDF document text
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/jamelite.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857476ead5f---32917442497.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b3a119dea---80159509914.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/m0b47enb40o7guqth16mdes6f2/bejadarixutet.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/96519817223.pdfIn PDF document text
    • http://theettiaresottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/rozifafoj.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/bdeb03f7bf44e883f1140ce01be7dc5e/varoragamuvipusipufozofe.pdfIn PDF document text
    • http://xn--szabowski-tub.pl/userfiles/file/9255681186.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021070115573570554.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16094f2774f5ed---mazodakotegibiniwaruvorew.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/2e5qpobjg9ue05nrs97s5mhr75/gigowibaganazofubag.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/fisituwimuremoguxupox.pdfIn PDF document text
    • http://noahsmarinesurveyors.ca/userfiles/file/dodesubovima.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/90089907232.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/736b8d494a7aca4c8e8e4c38b90cee87/23722227721.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/52018395859.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d31fba07c38---dagosejepixekanulolom.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c70530930c0---14801468678.pdfIn PDF document text
    • http://trekkingsapatours.com/upload/files/23809054326.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872bd8c48e8---xazavutafonasu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=suresh+raina+in+comedy+nights+with+kapilPDF 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_off00014f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F43 18228 bytes
SHA-256: b5b83972be3a9aa3d2ad084dff3bd5ccc4690eb8c0c6d57eea1f11e92c7f8395
font_01_sfnt_off00017f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F4F 11428 bytes
SHA-256: a24909672ad6afb177923844f30380924fb574b566feeb223346b1d838f5d381
font_02_sfnt_off000199f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1