Malicious PDF — malware analysis report

Static analysis result for SHA-256 5820258b27021c3d…

MALICIOUS

PDF

87.6 KB Created: 2021-09-20 03:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2207e686c436c3e094500bf96b4f60a9 SHA-1: fef523d06d4a83b13d3e3048da504b1a5f48026c SHA-256: 5820258b27021c3dd4e251d07cacaa9eab5b57306ca1e91a4a1bb6328a52090e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. The presence of 'utm_term' parameters suggests an attempt at SEO manipulation or tracking of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://jjc-dev.com/userfiles/file/23072159927.pdf In PDF document text
    • https://undergroundtakeout.com/userfiles/file/22992592183.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/gasatasuzoxapame.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/85100369033.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a9897636840365e119b15c27e569230c/56296782191.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/mutefapoma.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/59846413316.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/84e95cde9809aee324b5efb2c5f45c3a/67004922969.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/22171720876.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/zifazaretekageropivob.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/nisujanogaja.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/85029422434.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/70564656882.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/bebexepajovomodizum.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613add10d639a---sududigojil.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e40d80148---fatolotawoduvanizito.pdfIn PDF document text
    • http://peoplefineart.com/assets/202109/files/20210905072419745178.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/volojilurajigaxam.pdfIn PDF document text
    • http://calisnt.com/uploads/files/45498721991.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210905/files/20210905214757.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/25697807175.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/xenoxulasija.pdfIn PDF document text
    • https://citronel.com/userfiles/files/jogoxavero.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=8+ball+pool+new+hack+2021PDF 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_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 10736 bytes
SHA-256: 2e15cd7b63478e094400cbcad2a0405b9b4aac85aa2bb413ede978a4259d07ea
font_01_sfnt_off000108b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C9 18564 bytes
SHA-256: 5eb9a2cef55bf500bf557081a17e272fa274ecda7e4a72478a49d07bea1307d8