Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a34ff81b654d40…

MALICIOUS

PDF

85.0 KB Created: 2021-08-28 12:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a04895cd4f603f5d579a495789bfc2c7 SHA-1: 25e2627105ac9b1e80a20247b356df15e379a85b SHA-256: 60a34ff81b654d4055e5825b6a3bba403a31adb8ba55c8cd340c23f98c996209
156 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and link farms pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=talk+back+in+your+dead PDF link annotation
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/raxib.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/0e9e1e536c2df336dffac04c848c381f/dilutunugekowifexuti.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3fe1468f6---28600383221.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/92337166214.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac9bb04af7---diwixozesuvupabilajimika.pdfIn PDF document text
    • http://vhshf.de/File/tirejazuxovil.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/lujizumila.pdfIn PDF document text
    • http://freeorden.com/media/file/sowetojofofami.pdfIn PDF document text
    • https://buyafranchise.org/files/files/mirusirutobiruxulamiv.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/856j006vujt9bi2htecujk23jq/lezotuvofitisorotiwut.pdfIn PDF document text
    • https://dineflon.com//files/29295354867.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/24820486656.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/09accb9cf6e3da909cf8ed7bea00bb8b/6218384871.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/fipih2l15l15bup4l7fu83nmj0/nosuranuzatoxe.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077baef414dc---23782901091.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609119c38b9fb---dirozevajesone.pdfIn PDF document text
    • http://hobbes-group.com/upload/files/tuguwejadotasepixurugupog.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/40191646970.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/46757201676.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16097f7614b507---53483695117.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/69044827462.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1624018990.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096943ef402b---32625265730.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_off0000e837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE837 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 10508 bytes
SHA-256: 2d215ec76af9ad1d2abda993d1c69b11f4e7a2a92e3c955094abacd666c32908
font_02_sfnt_off0001184f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184F 17620 bytes
SHA-256: 273db4d4b16d9ca320b989f8065f5b5db0f3892b1e5ad2cb5ffa9d81a9489094

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