Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b7175e865daeb4…

MALICIOUS

PDF

83.3 KB Created: 2021-09-06 04:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f842edbf246d37e919526752b1025ce5 SHA-1: 174cf017616b6cb5b97ee7cf4734755a6b860fed SHA-256: 98b7175e865daeb4b1384f5a63638c865857e6c9d9af30b5b568bb551e4541c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laborke.ru/uplcv?utm_term=la+campanella+easy+version+pdf PDF link annotation
    • https://aaaxxion.info/images/file/wusuzagisolusukonew.pdfIn PDF document text
    • https://roarmysecurity.ro/mm/file/finexevozaluvafexajanobe.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/d0ad1397cf8876472f221f6908c6cacd/siledobigilo.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/64430957429.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/161133a76ad3d8---kazezu.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db41fabd5c9---fivulisofaxivuwelosakef.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/d06534dcc0ba6d92cbf33ee872dd00c0/89276618310.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dee033e0b7c---30969879345.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/49014116803.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/fitabowuwoz.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8daa5a1024---7372069706.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/93122333889.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/90065309641.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/46050343749.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/8f4823b8066be49b0d73f4ee16f8e869/34115828589.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/veroduramatelumilu.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846aa025146---60088792814.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/25606872206.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/vazifiju.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e248ec3ab---fegitoliresunazife.pdfIn PDF document text
    • https://datajournonepal.org/files/28960171218.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/r2carpua10cbvrc57mfkeqh1hf/60622863932.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d310e2f44---11328004408.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/76791091276.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1611c9f6feadeb---nitopoxofigupezojukuxoxo.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_off0000d9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DD 19712 bytes
SHA-256: 7ea2e8c4763921a10644c87c4ae9c9ac0d7f96884d8cc23f548fd212d9b738f2
font_01_sfnt_off00010e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E47 10820 bytes
SHA-256: 6ccebeb355a24c21c123d565efa94fb87cd1db5f4fa6ba283370e7c6cc1defa1
font_02_sfnt_off0001273c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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