Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f17d16545c9e34…

MALICIOUS

PDF

80.7 KB Created: 2021-08-31 23:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9a4af8f706eb57a63ce442626739ff1c SHA-1: a3c7b1ba20347338c2c619647ba1c3d905f251d6 SHA-256: 71f17d16545c9e34220991d85dc723950b79e80dc054567fd104855778dd3ecb
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The document body is unreadable, but the presence of numerous external links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609459089e5e4---keluviwugududixux.pdf In PDF document text
    • http://meadescafe.com/userfiles/file/6732748052.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/jatusurunabamu.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/nipafimemisakojozirajero.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/a78e9ab6da9d26deee5a51042b6c4222/62718040572.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/28281610762.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a89ebd9dd---zekukat.pdfIn PDF document text
    • https://luatkhangthai.vn/upload/fck/file/22649420081.pdfIn PDF document text
    • https://successalpha.team/upload/files/neruvobokedi.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/29709545787.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/14b9sc4da451emr5tmjas7nss2/totixitasaxu.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/885293babe312e90d8c2877d331efa13/wofogudakej.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/60963657230.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/6733567acad905adff7ee718dd7430b5/69806900879.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/suvabis.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/dovewufasusekapoxinoru.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2b4a141c5---juregivalupefijo.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/46664943393.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/73583712472.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/38575673432.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/o1j65g7gt238ef8pvjmsvf7oip/wapefod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=converting+pdf+to+autocad+dwgPDF 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_off0000d2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 10864 bytes
SHA-256: 988d15cb0b7953c46dab6bfdcfba6e0973b219cb806a5307e5770735089eca47
font_02_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 18500 bytes
SHA-256: f88315defb6e5c5b592a0ea1d896c219e6749b3041deed249ba702005896679e

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