Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee325eddea28310d…

MALICIOUS

PDF

108.8 KB Created: 2021-06-28 03:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b27f5ca3c084df750fc0a50255f00be5 SHA-1: ac3e724074f4c47b09aeedbd36b0ccf6ce19c7c1 SHA-256: ee325eddea28310d385d06cfbc8e951ad8b37a6ba6628fc770ea722a8debe041
156 Risk Score

Malware Insights

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

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 of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b14ab41765---43931619528.pdf In PDF document text
    • https://bwawarszawa.pl/upload/file/20101924402.pdfIn PDF document text
    • http://healthywithhart.com/res/file/bivalilodemuzugenefixa.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/tapotumu.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/89961123263.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/nimovusavanebik.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d2393ca58---19116921151.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/fubex.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607fabc3993ea---xesosodowitowobugokowefat.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609831d76bd88---mofomiwip.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da53fbba19---78458316396.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd122ee2ff---43531888039.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/repanoves.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/60293c2980d556c7ff96af6fbe4ec18e/1462729966.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/0929fea16e7682d494d45227b3056980/mewulofutul.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/xelovodalezoguzinavumo.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/50980829649.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8d72c700e---tuwuzidavawanedimofu.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/j3fqloojuef3f0echm814ddeql/52445827960.pdfIn PDF document text
    • http://93564497.com/userfiles/49660892294.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/38669926469.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b754d3ee0e8---2562730166.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b562db77714---bojaberamuze.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/43519184609.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/52270863073.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=combine+2+pdfsPDF 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_off00014538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14538 10544 bytes
SHA-256: 5557da17ba5ac7931885b00661523de886d7fea07140cfc74b6876ad5d9c7a65
font_01_sfnt_off00015d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001751b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1751B 19128 bytes
SHA-256: da60d2f968f3ac38313a294ea266879011cd79afa9c3cefc648a5c1491d810a7

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