Malicious PDF — malware analysis report

Static analysis result for SHA-256 897d9bddd2743c20…

MALICIOUS

PDF

92.4 KB Created: 2021-07-05 15:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0f6743c10b2ae9136362602ab13fccf9 SHA-1: 695f72c5940789d866bcd4b29cf8d7966e1a0662 SHA-256: 897d9bddd2743c206b46ddb68da3491f51792e2e177f5dfa41bb0fcd1c765762
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that redirect to compromised websites or disposable hosting, likely to obscure the final malicious destination. The presence of external URIs and link farm heuristics strongly suggests the document's primary purpose is to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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=weight+loss+diet+for+teenage+girl PDF link annotation
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7ac65f198---maxetafuratuvug.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160abe7f6e4238---56383981068.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba7481c83---towadegaxesezemi.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/catk1f0296tdu94260s701bai4/34623789581.pdfIn PDF document text
    • https://aedwea.com/upload/foto/69551004942.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/be77b60dd5a858fc1900db1416630086/99276513600.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e37e010f6---32579381800.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3fe3924dad0731cb1f3cfa936e67f6ed/bigivavokiretabafed.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/564067f4b9939ca7e6ca5a0be161b90c/ledebugixi.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/74444590580.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33c9a09ceb---29107258707.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/6ab61e035d3e98908622871374b2746d/91539552841.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa2dfa6e4c---joditexafu.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/3344421238.pdfIn PDF document text
    • http://praguetransfer.com/files/file/fikepanuverogato.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/powega.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/a902b5ab2a38bff71e9dbcc69a14d576/popibiwipojobepubuseta.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/kjjbil78dh16lk8keh3jmia7dc/tebofagenepivosij.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/53741435504.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160729bfea055c---mubakuga.pdfIn PDF document text
    • http://medlab.webd.pl/upload/file/10414647991.pdfIn PDF document text
    • https://medlineplus.gov/diets.htmlIn 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_off0001071b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071B 17376 bytes
SHA-256: 2f6698703d51f576b49b53cdc11dbedbad3671f9ad955b673b96f0c5e88ab8cf
font_01_sfnt_off0001344b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C62 10628 bytes
SHA-256: 547854c63be647f6365c570653a70ff6a33a3cfee9037015d2be83658c29ab80

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