Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ab8be09335d1a4…

MALICIOUS

PDF

85.1 KB Created: 2021-09-16 18:36:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 63f67d0f05bf33beaa504932443c7d48 SHA-1: dcdb5a43fec282156cc12854d989a80f7098fdd1 SHA-256: f2ab8be09335d1a4d356a9593d94076c58179abe8e37b6453863d7520e16677e
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the attack pattern of luring users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=how+to+get+unlimited+food+in+dragon+city PDF link annotation
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614130665dd15---21625486125.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343239cb5e2---rutokokedazi.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/71109577511.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/pivimemut.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vepimenoweboputusidade.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/9755950839.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/9509138409.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/21048846055.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/38892711500.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/jezijuzefiwotaserim.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/67420543704.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/pasegijonatomuvukex.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/940726a30633dd201f34840808af19bc/10867298896.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/56697072656.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/wenolofevati.pdfIn PDF document text
    • http://nbc.ua/design/pic/file/pifopozolilipen.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109030501545158.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/lumagamuxuze.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/muregavibovibiza.pdfIn PDF document text
    • http://skupka23.ru/upload/m/59330587432.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/13f4cf258d938754b22fa0de19a37776/64676761292.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/768950953.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_off0000e6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BF 18088 bytes
SHA-256: 52c306c53f8bc05a6c58dea2df255da218776770ef63db59ed0b3e82ecd1d6f1
font_01_sfnt_off0001157f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D96 10940 bytes
SHA-256: 1549f61688a5479456fd7aedeb046863be49aaf6ae3b2bc8fabeb4e70a3eb99c

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