Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8a4dc318d9d47a…

MALICIOUS

PDF

80.0 KB Created: 2021-09-06 06:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e92c194ad058e02b262760dba92bbc75 SHA-1: a52537c6edbf934fb12a6e7d93802c962c1ed7d4 SHA-256: cc8a4dc318d9d47a5ca4adf6a3179cf2c592b686d535e177aed78b504b3730e3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ketchas.ru/uplcv?utm_term=management+concepts+%26+organisational+behaviour+pdf PDF link annotation
    • https://benqmusicworkshop.com/fupload/file/28975028801.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/11936130696123a980aeb45.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/pazukupatikelujidulibafaf.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c16bd14543b---42268452999.pdfIn PDF document text
    • http://huiking.cn/uploads/file/261045462166.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/josuratexezisadipokeji.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/lusidujoninopunotiwibad.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/80347391490.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/wadigegapaluvunubizales.pdfIn PDF document text
    • https://scanclean.bg/upload/ckfinder/files/mibonetobukez.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/57098925317.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/56970649221.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/sivijor.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/6e51b16b562e9f579d8cd12291799ff0/zeverujase.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a0eb13cc38cc48b287ddaf8afecccf89/33115425288.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/diwusojopisexemanafe.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd5e280076---jerutudesopem.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/6ef6b05edfbc168d696ceab932d68671/30826124360.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/97475707199.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/zuwedabaxobubexikogejaka.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d596b0c444ccee215293ef6d42e37d10/7861177434.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/61325282594.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/638b09c2e945b0a2feec4cdadfd2b0ca/kaxupexisenoka.pdfIn PDF document text
    • 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_off0000d657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD657 17216 bytes
SHA-256: 3208f59c68290c24e3f30b8abda596bf4f1f5230b292e9eaa7c380334a4be215
font_01_sfnt_off000102b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC9 10472 bytes
SHA-256: ebe9314993a221b63fb9dce30818d4b3bea0745c360a4a2cd72dd7189744a296

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