Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab0637e70c4213f…

MALICIOUS

PDF

87.0 KB Created: 2021-07-27 16:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f617a0a19aac7b4c70b50f389f7667e9 SHA-1: 022d8e067a3730bc73fb51cced5461dcb240a8cc SHA-256: bab0637e70c4213f3265ddc040ae3563ba665834ce9aec73abc47c74b8841a8c
176 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Numerous heuristics indicate the document functions as a link farm, directing users to various websites, including those hosted on compromised CMS uploads and disposable domains. The embedded URLs suggest an attempt to host malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1e921194e---tukusetavizenu.pdf In PDF document text
    • http://clingac.es/d/files/saxowagebogemafilot.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/defanovutebogogusiker.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/bodakameg.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/rakasaxututemaku.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf749b1c98---21712862232.pdfPDF link annotation
    • http://ytovietnam.net/ckfinder/userfiles/files/95321109333.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be324665e9---87464415072.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/900835ea8417e8db3eeda0da2b5f67e7/jotafaxo.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160776dbe1b433---zusenobuwubumag.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/d9c44f3c4d5f4e0f19bbbd00c68a5420/darivunugomitufibiroj.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/2c939463155477bcf2683735eaf3ddd8/4923803636.pdfIn PDF document text
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/62628642338.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/48922013905.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/1bd8f1249b5e058095af3950734f2bb7/20555794010.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/331e7d8dffacdff8d079ac496eeba0d4/benimidosegesuluxe.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/9581776138.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160827868aad36---18782870723.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c43b7ea795b---83315830255.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a90cd02068c---lavenejinisumovibave.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/83357159088.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079f339b9f77---vamamibolezujusomigamizi.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/55959237563.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/matodesopu.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160739a3560cf9---xoxisefikokixiwokolot.pdfIn PDF document text
    • https://austarpharma.com/upload/files/58765253982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ejercicios+de+escritura+para+primaria+pdfPDF 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_off0000ee52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE52 17636 bytes
SHA-256: eada41558ef3a7e8eaf6dba0d0af3a2dc08011b9e34796aff98467b8262a45c3
font_01_sfnt_off00011b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13336 10844 bytes
SHA-256: b033d148c86e81ab52ba365459132a4c46c04e0f947d63e9f0cd02eceb69ea6d