Malicious PDF — malware analysis report

Static analysis result for SHA-256 826f24c75e47a1d7…

MALICIOUS

PDF

83.7 KB Created: 2021-08-18 10:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f5a7bc6369f09d4f9bd1a10a21a33cd2 SHA-1: b3653d33e88c7ee00803bef628332088bf44b94c SHA-256: 826f24c75e47a1d7d415a12103d6dc23349f7cdfb59ffd2dad29a2fb6c3073de
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://garglob.ru/uplcv?utm_term=how+to+perform+manual+lymphatic+drainage+on+yourself PDF link annotation
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ccf4d3729fee9adedf6af7793bd37162/85233915413.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/42635550356.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/pavimerusivo.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/197a0b56d8f64559f098e934042566c6/58214031534.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16101175d8b3e7---tanana.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3167923ca2---xegabobolagofututuvabesej.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/ruwewomomoleme.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/pabikavawaxojabo.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db23f99cf1---14225396168.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/bisezaxubanorugipuvu.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/49322298823.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/59976087940.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/050410446723.pdfIn PDF document text
    • http://esistore.be/userfiles/file/kirukajefalolali.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/kd9coieh3s3jk92tocdpb1mca3/67537476811.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0dbfejg8ga4ikma84frf5vrur6/jizewe.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f357a6ebd0---kiwowoxufi.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/53111110783.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d78531e4---pitefubuku.pdfIn PDF document text
    • http://abnicum.com/files/file/sotexikixid.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/vnt99qd5rt9vkgvivb6bsuu64e/76954275480.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/veguvepurikubunaxezop.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0e712eb2332760efa45fac850c996450/keraxezusulafifezizodo.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8220_20210717142415.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_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 11360 bytes
SHA-256: 24c774b428e8dd78e596bb51640448ad1c00c7b5d0be829c256c993dad83bd50
font_01_sfnt_off0000fbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCE 16420 bytes
SHA-256: 09b3a52f8aaad534d2e9ae93a9b47c2c93f54a5527dda1f040b89a4191acaa62
font_02_sfnt_off000125f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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