Malicious PDF — malware analysis report

Static analysis result for SHA-256 14690aee382b5154…

MALICIOUS

PDF

83.4 KB Created: 2021-08-19 06:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e200c201833e24ee3d937d3d6df0f97e SHA-1: 0b23e7519283f85fe81740fae32d962cafb2e35e SHA-256: 14690aee382b51546145e1ec25382b5b1f93aa85a4f369c5ee87287a78b90549
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 ClamAV as malicious, specifically indicating phishing and trojan activity. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=how+to+increase+androgen+receptors+and+their+sensitivity+reddit PDF link annotation
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/as6qjt7mktdog7c7t8p39k4dk3/ruwezupevukakober.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/dodajutatukabuduta.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210811130308.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/xadutowefofibakawalurog.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/f4un2ts6u41tm5rcf9n7ev96g6/goxuromorafurejudevozabam.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608f19eb3c56e---30988915255.pdfIn PDF document text
    • https://sbufficio.it/file/96108030321.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985f678d15a---42473913330.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/zekakamapenipozejebove.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b24ecae1276---36504707649.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021051909090293.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/25520144686.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/7bfcqq70ibu52e508of743qfq3/24328538833.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c599213ea1---toxufemopi.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/059609329960b836f217d629f4c31ec4/54058063473.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adb70bb7cc---38068698519.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0b298138d---87535720776.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/povijerunulirofuzov.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d14b31f94---dapabatozejuzibimeju.pdfIn PDF document text
    • http://pinxedien.net/upload/files/78261480699.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e4deb91c1---vogulejeja.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/zagijolawirelalete.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/16s6k3ndhod7kbgte86i8jg7es/90984847982.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/98881734908.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9edd62bef---dobifogox.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_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 11004 bytes
SHA-256: c16971405c807d9710895070b82fdb8691ac727ceea925d8d581a2d3b6e4ed97
font_01_sfnt_off0000faa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 16364 bytes
SHA-256: 620ca10d423245fbde0dc6ad921a1677b0d2ae4afa4f61ae8c91ee9f7c8df6e6
font_02_sfnt_off000124ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1