Malicious PDF — malware analysis report

Static analysis result for SHA-256 061a82ed77d36c96…

MALICIOUS

PDF

89.4 KB Created: 2021-08-01 17:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1601c946be40f9eee226b7cff91e9365 SHA-1: cb2f47d9ef2af8100fd12c5147dbf388f819a9d6 SHA-256: 061a82ed77d36c96edac67fc6dd88e76fec4ba45f102cd5c00363ef21714c82b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution campaign. The presence of multiple PDF link farm heuristics indicates a deliberate attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://mtreurope.com/ckfinder/userfiles/files/kezowudem.pdf In PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/d71d51c47df2a28c3eb182a6d78d26b4/56838023696.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/83928838366.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ddab05980---23887390128.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/kemepesem.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/157f9d9b25f9d1b5255698f833722308/32355592896.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/vonusiwumo.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/ee2d2099aba411927e54949dbf1f5358/gowutuza.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/fikulosulilexifudijevef.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/2f3ad3eb150a41007341157f8737aa30/neboxeguguroboweker.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883478cbc5d---towulabebadesen.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/91552828525.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/80033565187.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e143c7dc0c---94052332108.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/17111095635.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/14996050015.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c204a80f7d7---959468619.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210514161426929.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16230754839065.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/bebafa.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/48387a970ba42c3833e54194fef36ece/zoradevuwadekozigal.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/fajuxofejosowodo.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160877d64f27c6---bozabeximedabemojazigusuw.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/cc72f26e0f143288d89d2f3fc4f92523/41715524804.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f50482ed40d---69326818810.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=internship+application+email+sample+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_off0000f6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 17276 bytes
SHA-256: 00e28715d9a8e4cca2b28e1295c817c3e4203fc2cd7e400ac6a6350a841139fa
font_01_sfnt_off00012434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 10836 bytes
SHA-256: 15f744c0ffb73121111c36262b942a678802f5ed8d68e424ba6c275328796eb9
font_02_sfnt_off00013cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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