Malicious PDF — malware analysis report

Static analysis result for SHA-256 972e64f8b200a966…

MALICIOUS

PDF

68.3 KB Created: 2021-09-12 13:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3e3fd074d76c92468dc9056d0188401a SHA-1: dee3c1661c1a0edf8336ea716d35cb9730798ded SHA-256: 972e64f8b200a966b20345015954b85d66edeeca2b1e923703de8c67f78a4b78
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier returned a high probability of maliciousness. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are part of a link farm, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://phm.vn/upload/files/57117226501.pdf In PDF document text
    • https://autohausnschmidt.de/userfiles/file/tivovinevuxesolasu.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/61456228079.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/2363825843.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/18970039270.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/fifiwemewuxoselegisir.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/jopefowukuriwu.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/xaretuvukilazud.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/gizolenedugogowodowozuzo.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/17583219873.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/61207119083.pdfIn PDF document text
    • http://altronic.pl/!mag2011/userfiles/file/rosopuxepudutobojixu.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/7004538414.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8543ea778---55136277298.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34503621384.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109111906388828.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/34164675582.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///vuxabizatekizob.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/banisumetogegomujevefak.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/38994196990.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/jadilefosebowinirijega.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/kebuzuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=download+super+contra+for+androidPDF 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_off0000ae7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7C 14408 bytes
SHA-256: c36cf6c0f79f43dad57d5fe0298f2e4a901e29b9300ba75ad550b8791a46145f
font_01_sfnt_off0000d2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 10800 bytes
SHA-256: bbd7b7dd1078452657da7fb687ab896af71da9542d2be229ec2cb445efd9b132
font_02_sfnt_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1