Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f1f51947c8ca3c…

MALICIOUS

PDF

82.4 KB Created: 2021-09-13 11:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 74240a30e5a443d1c945838ed52fcf60 SHA-1: 77d5775de1193fe22324867d7b1b883d1e08f887 SHA-256: 52f1f51947c8ca3c5fc72c55c1f25b503e40be2660e78a5fbf161890cb68d48a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phishing lure, as indicated by the 'SE_CLIPBOARD_COMMAND_LURE' heuristic. The document likely instructs the user to copy and paste content into a command-line interface, a common technique to bypass security measures and execute malicious code. The presence of multiple external URLs, some hosted on compromised WordPress sites, further supports a malicious intent, potentially for downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://zamdq.com/filespath/files/20210903055427.pdf In PDF document text
    • https://wsbtitan.com/images/file/1118108251.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/38992988073.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/3c19942c8a6d5ebd0d62447d4ebda7be/10200468867.pdfIn PDF document text
    • http://mfcpavpos.ru/file/zojuvukudutasu.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/riwapekagulifeton.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/65281059791.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613ede25dba3f---86323062024.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/bokitanepedozarezobe.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/6998017846.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/sunovudugejekitefuped.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210905_679F7E582BF698CC.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/zotafewofokisopi.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/zuvegomufopuxivutil.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388e14131c7---newugamelusaxon.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a92fbbade2---38341508584.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/xewularapozukogi.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090309172773499.pdfIn PDF document text
    • http://micruts.org/userfiles/file/katol.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/85404772852.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/70761871340.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/sekazedopogis.pdfIn PDF document text
    • https://istanajp.com/contents/files/ranalom.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/34571552870.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/bezadigiloketir.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b207bb8b0a---zefojudozapiperikid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=nsw+white+pages+telephone+directory+residentialPDF 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_off0000da4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4F 18392 bytes
SHA-256: 1d8bade0ce8391dec7cdc5ba56540e734cf186f94e9205783049e76098e0de2f
font_01_sfnt_off000109ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12204 10968 bytes
SHA-256: fa0da214415f23570d627a3a7071cf5e7365d136a99269c25e928c5621ce6efd

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