Malicious PDF — malware analysis report

Static analysis result for SHA-256 926ce311fb0cfda6…

MALICIOUS

PDF

86.7 KB Created: 2021-07-03 07:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 28bc6017433341eb170f4a41c77cb440 SHA-1: d2bbba2edd00d851f9247af5c855c0d020d631aa SHA-256: 926ce311fb0cfda66032b27fc9847555ca8062a8717e1d1b714e0e569e0ea1d9
96 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or manipulate search engine results. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a focus on directing users to external, potentially harmful, web resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c51e22a8569---82651098525.pdf In PDF document text
    • http://tipiland.net/upload/file/galajolapawere.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/54f9321a08877bfaee25033ee1334403/47454276980.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/39949358376.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/16292104409.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/2620696001996a4d4e0240c69a94ac88/negatodoleverewufifufiri.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/datujezemarajupifad.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/botexenezifuxudonatejem.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/zarizugifap.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aec0b51309---depobifofilidomubo.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/rudedorosi.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e8017b251---5955914216.pdfIn PDF document text
    • http://phsclassof1970.com/clients/875774/File/31423130496.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/zuwuzitetube.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7a5cf88d363434397fde50b14cd72cef/49781367914.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c5967cce7fd---zuzopubosevamajaxu.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071685c1e022---fileberep.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/f89e292e1c9c74ee86f8d4cff6c87b23/nadote.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/vdsh4qt9mbld3l1o6j8bmtcf4v/23777868264.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/h78h1tjh3munujb9fkou4koof5/29739303638.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc4b400b8f02867444b758543d01b56d/tuxakine.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/19636888036.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=masters+in+neurosciencePDF 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_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D7 10268 bytes
SHA-256: 2cea57aff8ef3c1df68ff505f3d6d8b7fba1b755c3f24ab60c5a2a0b7de57537
font_02_sfnt_off00012118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12118 17104 bytes
SHA-256: b2c84bbcc2f076d2fd5143edbace8b32f07c12fe5a595fbc470d2b186a4fae29

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