Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c17ed6ea0ee77bc…

MALICIOUS

PDF

92.8 KB Created: 2021-08-05 09:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 801dcf27bc1bd858d4cba18404114968 SHA-1: 149d64c5052da3748b75f9ac8a4fb6663a9d52bc SHA-256: 1c17ed6ea0ee77bcf88b1a3dbb069750c5025fefaa7b3c8b481692e43b5e2866
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of links, many of which point to compromised or disposable domains, suggesting it's part of a link farm designed to redirect users to potentially harmful content. The presence of external URIs and a link farm heuristic indicates a deliberate effort to direct traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://beateromer.com/bilder/file/zamegilunemurulanalale.pdf In PDF document text
    • http://oaklandscreche.ie/userfiles/files/xivadurud.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/90560928512.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/zarozoged.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/wexapilu.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/69110804499.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/73282743424.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a9f0198ea---xikeludut.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/r4dh21uvr640k4quolphe2me11/nukivu.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/57951294098.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c808918a1---dojopedanuxelera.pdfIn PDF document text
    • http://vce34.ru/attachments/file/dobanalazezonirewezofediz.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/sazurupevejisesu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7bf4686a59---30376568597.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/b81e60ee67a40c3eb768ef9924486036/71116326510.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210726080219_y5153l.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee89a7b73a---rinezolunapow.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/cg72t7i4qeocsr8sj26kv6g9a4/16975724501.pdfIn PDF document text
    • http://xn--80an2aej.xn--p1ai/up/file/52193029985.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/o39di2e8nrk279d72vlqg13243/68863843755.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/4141495621.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa0a74f171---dugujemarimuribagaje.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/fda97356dfe076da1b71a38d681e91c1/wosibas.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/32969547053.pdfIn PDF document text
    • http://brlairport.com/images/file/58468085598.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=vw+polo+2002+repair+manual+pdfPDF 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_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 10792 bytes
SHA-256: 177f6ac671f77e7d5e3aa2b9d9fdb89ce66314ca0c394e1e84241fa851f3acee
font_01_sfnt_off000120b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CB 17408 bytes
SHA-256: b3564c70968d9674c20c611e83aa673921aeaa312a307adb72aa8766b16d9ed8

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