Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9a26f4e77e02d2…

MALICIOUS

PDF

83.8 KB Created: 2021-07-03 23:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d93810abdf2caed7fae080b963a069c4 SHA-1: 7d06911b029e529b16f69a887fdabe532d725424 SHA-256: 8d9a26f4e77e02d2d51cb373d95c43437ee92e748b0d1b492100d5e4d0c11917
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF itself does not contain readable text, but the embedded URLs and heuristic findings strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e27490c66---pumotuzosibob.pdf In PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e11b0922d34cb0acc3289cb57764a9e8/vuvolezasojivizufer.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/92448207688.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea3a4450c0---pekibukogatonamobedaligen.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085024b66fec---73199160902.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c0144a476390496d47058746ef9c9047/vifufezasurakutabipome.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/4279bb753fb18c6ea9fae0b05424c651/22510911041.pdfIn PDF document text
    • https://hssanesteban.cl/files/vakaserewotepusej.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d42b6ae658---41151155418.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/fanuluxejis.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/gefesilosed.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/48173174034.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4c1f23acf---98048138869.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/wetewis.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/295fbed6e0793a3cc01bf11f3b7e3654/40630524541.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/fuzigiwimafateluni.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/63048797860a7b5ba3129a.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/16114870770.pdfIn PDF document text
    • http://www.toptehnik.si/images/leteziruvowawojo.pdfIn PDF document text
    • https://seerupit.dk/assens/file/sibozemawabez.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d48434dcc6---46826359052.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/f50d00ee09465e12c4697c6d941548f9/13884115746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+lock+my+computer+windows+10PDF 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_off0000e1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D6 17076 bytes
SHA-256: 1bc3d2206f293619ab45b1a46703aba72f2e1c088fde7c175aab9a92561315b2
font_01_sfnt_off00010e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9B 11068 bytes
SHA-256: b494f90eadc3abff0f1c6a5be93c57d8a72d6fd6552b0059c6d5aac8e445e214
font_02_sfnt_off0001286e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.