Malicious PDF — malware analysis report

Static analysis result for SHA-256 347c5440c46820ad…

MALICIOUS

PDF

82.6 KB Created: 2021-09-13 23:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6f39fd9e850d61b170b9da557f00dc72 SHA-1: 7cb8f7e5beec2bb8f409929b57cba35cd3de98d4 SHA-256: 347c5440c46820ad7c4135033e0fce6286e644474272d3495ea5555f3e8f31cc
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous extracted URLs suggest the document is designed to redirect users to potentially harmful websites. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or malware distribution lure.

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 http://119pump.net/d/files/22233702723.pdf In PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/61504901660.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/22325911465.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/jagupabuvuvokarozurojogu.pdfIn PDF document text
    • http://taixingchem.com/uploadfile/file/20210907040214947.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/42078444307.pdfIn PDF document text
    • https://gangnampools.com/contents/files/54879131150.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/20376673876.pdfIn PDF document text
    • http://mlight.cz/archiv/file/miwafipudikosi.pdfIn PDF document text
    • http://qishuochem.com/siicea/userfiles/file/65610698001.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3c9519041---54748484314.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/bekuril.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/zojorujoja.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/gobebutepazupiluvutiwovaw.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/linuleroka.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/31459902394.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/43999506017.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133f2477fc22---senodusetekemarop.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/sesolesevosuvuzet.pdfIn PDF document text
    • https://e-midas.ro/files/file/pufulotuvobukegijeganun.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/dusisoburipowegat.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/wewasa.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/wanoteroruremejifepuxunev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=obb+for+dream+league+2020PDF 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_off0000df76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF788 17260 bytes
SHA-256: 4c7c6e116e3d8c121aec55adbda5c443340b0074eda06416a230593089a95afe
font_02_sfnt_off00012423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12423 10744 bytes
SHA-256: da42991cb65ce4360304b582b305f752c312f6e5108d72c6438a568a7011b71d

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