Malicious PDF — malware analysis report

Static analysis result for SHA-256 f872d01a9e436a47…

MALICIOUS

PDF

82.1 KB Created: 2021-09-11 18:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b67ad76ae12b3bf2ee52770638457d18 SHA-1: 3278d9f233f94fccf2b6153b86b26f62fd751793 SHA-256: f872d01a9e436a472b1b92cf3e69a75b2fd368b688972756f6dca8305a32fa0b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF sample was flagged by ML and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URI heuristics and the 'PDF_SEO_DISPOSABLE_LINK_FARM' rule further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://allytemp.ru/uplcv?utm_term=pixel+experience+rom+redmi+note+7+pro PDF link annotation
    • https://revive.fashion/upload/files/zobitadafezituganidoka.pdfIn PDF document text
    • http://montesantangelo.it/files/files/midifadebela.pdfIn PDF document text
    • http://nenorm.com/files/files/34459010702.pdfIn PDF document text
    • http://cabini.it/userfiles/files/gozukopivadulajeridutife.pdfIn PDF document text
    • https://photojet.net/userfiles/file/leninasofol.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/komorezuregazozubu.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/15821185591.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/kedit.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/64326642935.pdfIn PDF document text
    • https://istruttorecinofilo.it/userfiles/file/13641073877.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/14128552927.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/wilajitu.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/64364766186.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/98696426754.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/mafefekubo.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/10399130985.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/68087884320.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/88255119058.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc7ce16bba---gowomezuzar.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/22468986581.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/fizijigadebepofu.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/80597794442.pdfIn PDF document text
    • https://superpart.com/files/daziwenofisajenu.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_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 10500 bytes
SHA-256: d815fd7f14eb33765076f23caf132c4a5d9a1caf5ab4d13a654ca3f4507a453a
font_01_sfnt_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD8 18296 bytes
SHA-256: 349d6c1b0569630261a6647cf33367a94515ffaba535d45feeefecc6076cea90

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