Malicious PDF — malware analysis report

Static analysis result for SHA-256 962545bdd1e63935…

MALICIOUS

PDF

82.3 KB Created: 2021-09-16 23:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3a2b280ab587bdfb31d8ef02dec2efa5 SHA-1: ead14ef0c5f482f4469fa1edbc91f291feb28c67 SHA-256: 962545bdd1e63935c457f962fb51f7d4d4b8eb821610e1c055d423d1f90e27c5
146 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified numerous embedded URIs, including one pointing to a raw IP address, suggesting a phishing or redirection scheme. The PDF's structure and content, despite being heavily obfuscated, align with typical phishing lures designed to direct users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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://atenngo.com/admin/sites/site/documents/tegetifikovotagigil.pdf In PDF document text
    • https://olamare.com/img/uploaded/file/77705428942.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/53953799894.pdfIn PDF document text
    • http://shoreluxurylimos.com/userfiles/files/4481842379.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109080557459210.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139945c78403---13351296501.pdfIn PDF document text
    • http://deleersnijder-bocaege.be/images/file/lokopeluwuxo.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/kixibofogakulama.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/nejazazibemexiwek.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/jimuxu.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/80111295118.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/kuvolofefenanope.pdfPDF link annotation
    • http://maslag.eu/userfiles/file/kefuzukolivodozibejosude.pdfIn PDF document text
    • http://sswjeans.com/files/1371075179.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/7219472714.pdfIn PDF document text
    • http://terrietanaka.com/library/files/19132540936.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/jidogapazugasitomavewi.pdfIn PDF document text
    • http://candientuvibra.com/images/file/82232216918.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/6635884243.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/99246282051.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/48876418031.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/27763446977.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/lipeja.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/wesivomifilopofutiwut.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/51371136185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=apple+music+gift+card+code+freePDF 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_off0000dcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 17544 bytes
SHA-256: 664efac3789a6abe654b8617f7cad9dcf78bb9ea274561a77e7b1b8e45768ad1
font_02_sfnt_off0001229c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229C 10940 bytes
SHA-256: f5b8f1abef72706d2c4ca70b167d513a5e18340f695264e1d92fc1b6024cde73