Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5150f46b571725…

MALICIOUS

PDF

74.3 KB Created: 2021-09-03 07:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cb5cc637f2a19729d9b0b78f273d8eab SHA-1: 2651483cd60436133dabc9266ccd2b2e03879ef0 SHA-256: 2d5150f46b57172518a3891dbd75c3ac400b67493d15c15021e14ba0f433035d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to other PDF files hosted on potentially compromised websites, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1c485791b797b602d8ca1b9998650088/70117747297.pdf In PDF document text
    • http://planetamama.ru/files/file/69032187965.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/dab5c9ed38cb80debe7df303dfed7b2d/30543387881.pdfIn PDF document text
    • http://vce34.ru/attachments/file/faxivarunifozan.pdfIn PDF document text
    • http://wawa757.com/uploads/files/19018593821.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/36105027190.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/mazefuzagoleragugug.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/lumarekefotewupufawija.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/75052231648.pdfIn PDF document text
    • http://z500.si/files/95230340819.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/jawugefonisexugu.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/dglbuaqkkjnlecn6aj2eh93np8/didufatudosup.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/fubeguga.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/6883830812.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/cspmhrs1beedgfp595oenndedu/68256844710.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gelimamojofi.pdfIn PDF document text
    • https://equinox-e.com/upload/files/bokonoj.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2118232d10---xixox.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/fadevarajiwuxu.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/69460737440.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/2b84f69f1aeee43418f1bfda2f2388a0/73537061555.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/22448928912.pdfIn PDF document text
    • http://nikacarpet.nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/99770026413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sonos+connect+operating+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5A 17484 bytes
SHA-256: ad826fcdc2f5fed1366d0cb4b704f7718ae3718ca98ef8b6426e265d93d4222e
font_01_sfnt_off0000ea64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 10892 bytes
SHA-256: c98c4bd7cc73d846f72d9c056cc461b29c15632e36411eef47f34eb76354481b
font_02_sfnt_off00010392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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