Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fee9e4ed9a12b65…

MALICIOUS

PDF

84.8 KB Created: 2021-08-10 00:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7e1e3f20a5d5ce96be975ee93c443d7c SHA-1: fc6814dc1f9f416f7a944b52ab6470c6e78764cd SHA-256: 5fee9e4ed9a12b654d50a4ec7f70ffc8df1a9a4cb063534950bd8a14a7fc90df
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of numerous external URIs, including one with a 'utm_term' parameter, reinforces the attack pattern of luring users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pistant.ru/uplcv?utm_term=how+to+read+dexcom+g6+receiver PDF link annotation
    • https://247christianity.org/fckeditor/userfiles/file/sosevidibetedozefubib1620708691.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/dizepuva.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1621187621.pdfIn PDF document text
    • https://aquatim.ro/uploads/files/bifipiwelajaro.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/85005972644.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/kiwizo.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/kasubewinanulexude.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles//file/tazoborazuviju.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/69016bdb55488136bb82cb685d8b9fcd/difusabobijasix.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/mvu8tpl3pliu9jk4duqmq4pqib/vinilatadibudafuxaku.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/73556256474.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/mepor.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/40867178292.pdfIn PDF document text
    • https://tantecoccole016.it/file/79427281121.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4288135d1---15007829877.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/0b8a87f05e175196d531516913981928/pegugifoxevuliwemowosaf.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b45bcedefd8---41275239420.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/91020800651.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070015ee310b---57187301853.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609dacfd3ecdd---sapozes.pdfIn PDF document text
    • http://asustainable.com/global/file/78777121326.pdfIn PDF document text
    • http://yilip.net/userData/board/file/4478627523.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_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 17492 bytes
SHA-256: fa48e0d34737a7dc33134206e46c1573a4d053ec8eb3a44859f21fc059ef2cae
font_01_sfnt_off0001150b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D22 10808 bytes
SHA-256: 5c23dfc6936616346bbd231c5ad8ffd583c174e236225000ebaa6991bae5cc5a

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