Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eebf1858cffd001…

MALICIOUS

PDF

130.9 KB Created: 2021-07-02 00:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: de5f62b916e5b972508dacba71d798fd SHA-1: d10c26734b378481366753be78dc66f5a02a0e9c SHA-256: 0eebf1858cffd0014d4e2bc2369433b955b048ee1de77cf49fe9198f653585e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or facilitate phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/eeb986037f2b30730bc6e5886988b378/zijeronuzujof.pdf In PDF document text
    • http://splogservice.ru/content/file/kovovulojo.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070154b75e28---31630478209.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/sipisarave.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/12528624111.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/87549256883.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/a21098d8325c4e25919b8f045c38e0c0/jililiporutitobefofu.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/11024882543.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/t1qtlcrdei7a7ajs6gc1g71d41/lulav.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1147df972---26187695147.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e1c2a633963502376183bef0fe36c830/54838104187.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/rs72qfig2l9bp0a2d5b3d3la3c/14055633273.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/a0776cac5589ded8a3c69cbe4b1bbed8/bagowutuwa.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31a1917796---megavabu.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/mixiluk.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d8008928c---sexonetizarigo.pdfIn PDF document text
    • http://mega.kz/media/upload/files/62725087980.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/liwejojalimukesazo.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/9s9jh26na9fdvp843tps4q320m/4744585785.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99f373a824---51339341567.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/fukim.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/mumip.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/69093424244.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/nebotuxugeregodutek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=history+of+stoicismPDF 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_off0001931c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1931C 24780 bytes
SHA-256: be3141c241205080455821c993a2b5661b25ef08d054dd270f8548c950268fa5
font_01_sfnt_off0001cf5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E776 10160 bytes
SHA-256: 140182e84d4a3c047c7bcf440250636d608cde0324bfe29b6b57e161cc75822e