Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c003b569360135…

MALICIOUS

PDF

85.1 KB Created: 2021-09-02 06:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e6273f5fc82d8bff581be6b46a779e3b SHA-1: ca8e7ef9d973282ce6bf281c164f0f10a0260681 SHA-256: 47c003b569360135abd1cf17a9ccea30e6a30d461d31a7998b0aa645462672e9
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure as a link farm on potentially disposable hosting further supports this assessment.

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://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/4ee56032b65fc796d7696134bf661710/36932442862.pdf In PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/2871b967c747032c147743956028ce5a/47812031017.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/89431967072.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/jufec2dq93uct6b3iedoj90ndo/vorilevaruduzap.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/18765a337f951808c6127f14003f0017/mimesovafomexitoloraviji.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/tijafanoxap.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/9261701823.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/96455801136.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/68173694841.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/lutidabifiwafuxadaro.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/sivujitamavinida.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/bebimufosanotixew.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/bedobiduzukelubi.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a270f36226f---xowidipasegoxofojuz.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/sevesafusoru.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076508e641b2---9205726759.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713324de53c---wudejutawivopamej.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ed1f1ac6b2d---33802328942.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/gevilesemudomotopugubon.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/77942724582.pdfIn PDF document text
    • http://lueckerreunion2020.com/clients/e/eb/eba09433058400eda594a485f9004317/File/nejezunogemavizikanuvep.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a56ab3924---3682855607.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/vowemekikufewozaxogaboxu.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/rutuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=2020+mains+paperPDF 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_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 10296 bytes
SHA-256: e8e142a0acc2dca6942bf59e31982cd5785126131ec0b5113c2a797b31798706
font_01_sfnt_off0000fe4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4F 18668 bytes
SHA-256: 861e618fd1ea0d31c064d82fc4a35150c62325b629dd3b4087c105cc83511f93
font_02_sfnt_off00012d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1