Malicious PDF — malware analysis report

Static analysis result for SHA-256 754f3a906be6fc5c…

MALICIOUS

PDF

69.0 KB Created: 2021-09-10 01:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4aedb6844080ca09bb135c2095409c25 SHA-1: 8cdabd11b3e218ed5690d07c08df95c876ff0eda SHA-256: 754f3a906be6fc5ccd615cfcf346e4e76b0ffa7566e882523bec04abcfe78561
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous links to external sites, some hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://greenlandpark.com/uploads/files/11314568686.pdf In PDF document text
    • http://studioaeditecne.it/userfiles/file/29734017720.pdfIn PDF document text
    • https://digireg.ru/upload/10725394579.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16138d82bc9225---33550825064.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/23507743096.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/0531036dbb5f4229c93dfce072ec7688/gaxulujite.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109092052104959.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/91477350745.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/16697342859.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/rumitomaler.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/304705810adb284405205d187a657509/lewirofewodowapamokewu.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/sakepufubonisakesejas.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/11896533507.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/66495545169.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/68928716131.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/riwefugurizojazegi.pdfIn PDF document text
    • http://tipiland.net/upload/file/sekapogutisogajibenalal.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/tidavekuvogedugizajibobo.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/98510558040.pdfIn PDF document text
    • https://bakwanudang.com/contents/files/47073791189.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/84324336940.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/zevixusoturogi.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/42125001526.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/febunavika.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/mbr7mg5rahr9sb58jmp8kprl14/nibukokepulizovik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=paper+minecraft+gun+modPDF 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_off0000b340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB340 14036 bytes
SHA-256: 6040fd0f4d55a5c9fb32f569ab2fb46d7255b52e498f67e80cb6ade18c0fd0a5
font_01_sfnt_off0000d562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD562 10848 bytes
SHA-256: dbae3fd0ddfc59580b911dbd9701af52328a4f51cc977f761de673e77c44c36f
font_02_sfnt_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1