Malicious PDF — malware analysis report

Static analysis result for SHA-256 7100f8c8f3d71290…

MALICIOUS

PDF

87.5 KB Created: 2021-08-15 02:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cb4e9a16a7b70efcb04a4021a58a725d SHA-1: 822972c9058abae758122c194d5391328d0d90de SHA-256: 7100f8c8f3d712903ae990a3ade4d02f748cff5a0d3f03e1f97be2fedd5f9664
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting sites, a common tactic for distributing malicious payloads. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive and provides a password, a method to evade gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://balarampurblock.in/ckfinder/userfiles/files/lidujiro.pdf In PDF document text
    • http://mamtomchabahai.com/uploads/files/files/tumemiwusetozifanonavuz.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079ae5f17870---5308247526.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/piburavupemanovi.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/gokexe.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/50705634620.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c8993a3d4a1---powakusaxatamese.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608307d861780---69138063101.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/dc7266b8293a234280975adaeb106c56/13790417039.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/jp3gsoqmqbgreucv78jqvhh876/pesegivizanu.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/a3225ff7bb51193f9648945aa15e4f12/68762698468.pdfIn PDF document text
    • https://masukpt1.com/contents//files/gubud.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/dofadisutajobemewepetub.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade716d8655---28374666415.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/73546260858.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/fesedenixe.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/un3q2m8r879q7afvv3f5ej1vgl/dazolubulubewipimadujut.pdfIn PDF document text
    • http://www.77ice.com/upload/files/34567174232.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad0869b97d---mogefawawub.pdfIn PDF document text
    • http://dd-eng.com/files/files/70984344805.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/2952dfb274c6882906ed6f5686f672c0/79934544603.pdfIn PDF document text
    • https://o-dance.com/upload/files/93129068707.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/d084ff3c5070716bbfc45f6e197f11ff/fajawovag.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/jolosirobenofakakib.pdfIn PDF document text
    • http://familie-schiecke.de/images/file/wukupinopalefof.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/sezeni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=guia+de+guitarra+para+principiantes+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_off0000ee1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 18164 bytes
SHA-256: 10b69a6a95c00313847346a2d1d3dea362b88ad5410615b01c3aad41d9ba0186
font_02_sfnt_off0001343e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343E 10768 bytes
SHA-256: 822aa94d02ca09a3f53d712fb2584a1e6069895d0310c21dbb1686b433e2f891

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