Malicious PDF — malware analysis report

Static analysis result for SHA-256 70139558ba441a25…

MALICIOUS

PDF

81.7 KB Created: 2021-09-17 19:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ab430b825cf94e538f6dfa44de0c472f SHA-1: 3c79280f8202223b1d55d4c5b00ead24a168f857 SHA-256: 70139558ba441a2598e58b98343ba8241e31b9b5ec31e5486ee1effefb39d995
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. It contains embedded JavaScript and numerous external URIs, including a link farm heuristic firing, suggesting it's designed to redirect users to malicious sites. The presence of JavaScript indicates potential for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=archero+mod+apk+unlimited+gems PDF link annotation
    • http://ambulanceservice.pl/userfiles/file/28806518528.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/nugofoweter.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/56120316330.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/kovodi.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/60006739254.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/nuzozuzadobofanitorubuza.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/8207590961.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/zipoxotabomala.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/fawadopunomararepukesote.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/zazibefijuxowilazuku.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/44617065826.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/jenibuzurumo.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/23776917726.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/gipemugaduvuwele.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613538c1be99d---zifufakaterexupadir.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/89007492581.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/tilekajixuganon.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/621uphi96vc50fm32etc18j6h2/12834363095.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/voduxuser.pdfIn PDF document text
    • http://falconltd.pl/cache/file/24221334853.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/88188672231.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/92437002069.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-12-03-34-25-79.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_off0000d7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AB 11136 bytes
SHA-256: 72d1fd86dd330f0847fa94b40fcf44aa280a7bae2f6ba7467c85bc00eb8dc02d
font_01_sfnt_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 18828 bytes
SHA-256: 42d2354dcf49c9b649ec1f0635cd2659e7e73a52ce6769527534aabd0c3f4137

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