Malicious PDF — malware analysis report

Static analysis result for SHA-256 b945fad8798cee71…

MALICIOUS

PDF

92.6 KB Created: 2021-06-30 05:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4af0858a306a9c4cdcb33006d5853e76 SHA-1: 5f2e4ddb1284e5710ce614b9f378af4a40be9d57 SHA-256: b945fad8798cee716cca1bc47502db5e5f4382c77a9f6ac932e5dabe15b02399
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that likely lead to malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are designed to exploit search engine optimization and are hosted on disposable infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://drafthe.ru/uplcv?utm_term=living+to+tell+the+tale+gabriel+garcia+marquez+pdf
    • http://alnadaoil.com/userfiles/file/ditobagireni.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/53936c5579b269b45caeb75ac13764cf/darusuminefajemikulevim.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/af8630e5031fd4eb4eddb7eb1258109b/tosetuvugopinen.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e63d6eb67a---sovuvejupenodape.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/79207778441.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/ma3b60f4g974026cfjdruf4pop/22198710065.pdf
    • http://uco-kampen.com/media/files/33411131301.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/585074250f2eac602ba43fc2f3e1fd96/wutomuzobezajozidab.pdf
    • http://acpiindia.com/userfiles/file/77953473616.pdf
    • http://celcg.pl/uploaded/file/13164762367.pdf
    • http://odnoklassniki-files.ru/images/uploads/files/50634896763.pdf
    • https://nada70.org/userfiles/file/56100517018.pdf
    • http://sansboundaries.com/clients/f/fd/fde0d4b6b324343791c5f0705b221951/File/vinurinuz.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609492146f067---20812838600.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16093b8d46670a---diririwevekiz.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/79da64af3a01a120f3fe4d414d04140e/ripazidejagem.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41f6aeeb3e---2658967874.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd46b644a7---18301501800.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a075beab8cc---rulodasufafumigakovulutux.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082951391a2d---bufatumijosekova.pdf
    • http://agcslohian.com/userfiles/file/22609481804.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37cc8c79e9---xefapi.pdf
    • http://escuelasfutbol8.com/docs/files/dulefaguwomeja.pdf
    • http://digitalpolicycouncil.com/imagenes/file/53602029921.pdf
    • http://provia-events.de/pics/fotos/1/file/goxojejagamokoz.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_off000105e8.bin
eb45caa190be1cdb2c33adda341ca55eeeb1fc91375c47be2fe18e26fd08ca0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 16744 bytes
font_01_sfnt_off000130b9.bin
07658d1908cea5184b970b8bba9d3d190b7c4ebecb35970fd82da7cc29883966
pdf-font-stream PDF embedded font (sfnt) at offset 0x130B9 11368 bytes
font_02_sfnt_off00014a94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A94 16792 bytes