Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6190b0fc1db10a…

MALICIOUS

PDF

78.5 KB Created: 2021-09-01 23:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 63a15685682f705b89beee4c607a14d0 SHA-1: 0d9d9e751efa6a6a00a8364db431dd2945629011 SHA-256: 1b6190b0fc1db10a81fb1210aedbb24b39f74668d00683d15babd4d202284230
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicative of a link farm used for phishing or malware delivery. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://asiavent.com/UserFiles/file///limagaramisa.pdf In PDF document text
    • http://j-line.ca/fck_upload/file/1193437995.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/pegiko.pdfIn PDF document text
    • http://bjjiffy.com/upload/bigowo.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/49c58648b80ca14d7038bd4c9f38c4c9/96445396732.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aeb0674dfaa142f999feccdddb13891b/53792097641.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f29f207281c---gofunezima.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/bimuzemivolige.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/0ab2b6dba38605b829cc1dd7b1ccf406/62154496209.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/0988de181fbef9e7ffca1e320813d5b0/21735887484.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d87896b825---30420663359.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aadc59c3af8---20320428643.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/se9bcpk42nfs6roo385phm18gp/34134908974.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/baviwew.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/munojusibebax.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc32ac51e0---nizawoxoduparowowufo.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/72911483738.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/87388440018.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/62538643345.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/88154337916.pdfIn PDF document text
    • http://jfe.hk/userfiles/94815012498.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/98288717590.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=which+of+the+following+statements+is+true+about+ionsPDF 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_off0000ccf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF0 17484 bytes
SHA-256: b7a7efade68bb9c2b520a71ab966a285977d2d778275a0e36c0bfa5161468ee4
font_01_sfnt_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11252 11104 bytes
SHA-256: aefa19a2204dfeadddd02f9b4b4a0596041b455bcadfbd0dba63e4c4b6071e38

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