Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7dffd86bc49f72…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 21:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8e33bd957d33754fdcf4feb2ba43acd0 SHA-1: 529cb5cc810a8806c2708c7af69da5d412b08563 SHA-256: 1b7dffd86bc49f72d7851ffdb74f77442c86f93d0e60c8ea4b8997300dc06169
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which appear to be compromised CMS uploads or disposable hosting, suggesting a link farm designed to obscure malicious destinations. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security filters. ClamAV detection and ML classification strongly indicate malicious intent, likely for delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=split+pdf+file+freeware PDF link annotation
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/6d2a468d18d7a21f808e3b2ad70fead3/49393976657.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/41949854822.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/1382455925.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/22821316421.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/186381fdbf09aef7c2e94bfe49e87d56/vodifozigumebu.pdfIn PDF document text
    • http://juentai.com/userfiles/files/63853011150.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/vojiw.pdfIn PDF document text
    • https://retta-bg.com/userfiles/34492006578.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b4a71331977---nesutexopemaragij.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/88633334814.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf979a53501---10834792993.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/xitatinorakezigifivovi.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/jiboxanidusolurokozu.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/kegememubafogakajo.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d987773572---zopagudowavibofo.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b58ea528f66---28988655016.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcdda18f99---85692197581.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/65cd86f94095695f9e559e90109d79e7/pebomedinamazexos.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608da23c25eba---9521466356.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/rorida.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/gegodogamadatinukufex.pdfIn PDF document text
    • https://bauarch.bg/files/bofomag.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/eqmhht2t0i87vaq5nua2ev3ln0/mipetepopomiboreral.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/39802788354.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612604413d215---59868725371.pdfIn PDF document text
    • 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_off0000e202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE202 16892 bytes
SHA-256: 3fda68822304cfc06a03b7d595e93ffb830057903bba865b850261a82690466a
font_01_sfnt_off00010dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DB 10260 bytes
SHA-256: f121d56f2a091012869e6421d502baf8b4d8dbd6c6146852894cd66f57d727f4

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