Malicious PDF — malware analysis report

Static analysis result for SHA-256 46692577a267db82…

MALICIOUS

PDF

112.8 KB Created: 2021-08-02 21:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9d6c8482393cd9258b7688e787544ddb SHA-1: 9f0b1344c20644071c6a362e7e5ae3e07c67f554 SHA-256: 46692577a267db82726c1aac705ec1043d918c1936083bf8f98f2f5018f0b12c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://soft-pro.hr/upload/datoteke/9198877698.pdf In PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/7536b8ec199b49a3aea13dc07b52410a/62554800641.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/56637924452.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ij0a65ea92lvifiq4it9g4joo2/50679766934.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/272cl6dd38qaijntaftcd7748a/24869635054.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/poduxagodalawugidizowovo.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a82544da08---pofixekesalo.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b864fb07ad4---wuvelevulasotavexepabogup.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/2857885683.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/f7ebc3fdd40b213f5e2c38e94dfc52ab/62030716092.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/74201060777.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/95674001117.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/e54fphkjfcgaus4l20ea6ku9a7/masokidinusuzaruruv.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/norudimogo.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/lezedaxikasixa.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769b29e00cc---31713598053.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/povafufi.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/pavokudubifeg.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940ffc9cc93---51332323678.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/41247442510.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d47e2dc38---48016830314.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/13020813555.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/0c553d6a37c24b5dbb19375721b650f2/nepomanijolunelorep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=nier+automata+project+gestalt+report+locationsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001464e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464E 3024 bytes
SHA-256: 14ec611af1c0a3fb488d298a3149a2be814f7abfd5ea32ce907f80b596765ee3
font_01_sfnt_off000152d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D8 10924 bytes
SHA-256: 5df5cea9db1978e0c00df657fdb8f014bee0d847fc53ad481d4cffa9e5a46bbc
font_02_sfnt_off00016c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C1C 17748 bytes
SHA-256: f8831de67ee53d6dee0831d8f714b142a08f668e0eac8930bd1b356282bcfe39
font_03_sfnt_off000199f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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