Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbeb4388f63256da…

MALICIOUS

PDF

83.9 KB Created: 2021-09-09 11:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3d54d8549b910cbeff8e65b518b8c95a SHA-1: 90f21aa74df31e69c3471b21a6718e063d687e19 SHA-256: fbeb4388f63256da1e458197ca4a0ca338f5249bc0667f6d0cfcbababb60eb95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=where+do+deleted+texts+go+android PDF link annotation
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136260d1559c---82786854087.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/68954597925.pdfIn PDF document text
    • http://agama-rc.com/upload/files/64305649612.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/vetawugofilisiwuladorolov.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/labovovi.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c51c8d8ef---zifeluzamesixi.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109021034098694.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///mututufapufogoxujuwu.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/kukimogaxexale.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/29333724742.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/fe13577130200d848a03f107bf11eda0/lazofitubiwiginabedab.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/10579236247.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/4380405586.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/linelirogij.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/83016378428.pdfIn PDF document text
    • http://oawebserver.com/piceditor/file/21630214068.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/lojomuxoxodibojoj.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/gijenezewulo.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/71309894535.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/pavijexitajowu.pdfIn PDF document text
    • http://vhshf.de/File/29321702509.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/guralujuxubujovelolapabug.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/takiz.pdfIn PDF document text
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/46624493438.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_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 17948 bytes
SHA-256: e0bfc84f765f801ab3d0db5f6eabb2afef33bfcbbb85810dc796fce0e389a0bc
font_01_sfnt_off000111a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B8 10624 bytes
SHA-256: 1453860638a7eba25a51e7b4ad9e17beb0dec5664cab6060436c77a5fcafaee3

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