Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c040713793f64c0…

MALICIOUS

PDF

79.0 KB Created: 2021-09-20 05:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7888c7dd69ae1ea2b63d134c6506f1ea SHA-1: 81198ca55686bd01dd3fe3218cae1c05e2074ab2 SHA-256: 3c040713793f64c05c2a5f56d0e86af5dcf597b672e501461f1f513698b0b998
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=harry+potter+watch+options
    • http://abwingsva.com/uploads/files/9347936374.pdf
    • https://posh.hr/files/bonukuxokadudakaxi.pdf
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/32009778550.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9d5541a3491a33f8346319c62132e5ab/56967747583.pdf
    • https://aljazeerahpetroleum.ae/userfiles/files/xakenekiwufemexegusixek.pdf
    • http://www.cerathai.com/image/upload/File/30564532998.pdf
    • http://flyingwedge.com/uploads/assets/file/fimeb.pdf
    • https://truckforceone.com/upload/editor/file/96883273591.pdf
    • https://uslugiinzynierskie.com/eurostyl/photos/file/35927896655.pdf
    • http://pereplanirovkaoblast.ru/pict/file/8955725205.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e33b2fbec---98156213061.pdf
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/sosumimujuk.pdf
    • https://fleschimmo.lu/userfiles/files/mumotuwugevewazu.pdf
    • https://byocamacho.com/ckfinder/userfiles/files/98255240139.pdf
    • https://buyafranchise.org/files/files/morumewewobezizanilo.pdf
    • https://penal-garazh.ru/files/52156050404.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6c.bin
b8ca67d3aa652a00dc4ecab14e8523599c50e983823625e850b7fb7c3b207726		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6C 18984 bytes
font_01_sfnt_off0000fe8d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 16792 bytes
font_02_sfnt_off000116a4.bin
a5aa83adfd84b720abd50c7a26a88fb82575cc7314f4dfa7405f80e059612101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116A4 10616 bytes

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