Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca585667b1d53c21…

MALICIOUS

PDF

61.0 KB Created: 2020-12-14 23:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 884e353eb16b7f19dc80936ce653156c SHA-1: 16da76e4ab6dcb63c9e1bd0bdc318e18430b4ec7 SHA-256: ca585667b1d53c212803b7fb70b8d6f08bd183eceb50e4971fb442fb085b2603
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate a critical risk due to the presence of malicious redirector links and a link farm designed to distribute content. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/123?utm_term=distributive+property+using+area+model+worksheet In PDF document text
    • https://pazolumaf.weebly.com/uploads/1/3/4/3/134356568/1633805.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/6736291.pdfIn PDF document text
    • https://bisudika.weebly.com/uploads/1/3/4/3/134366448/tuwinufi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a809ea5b-d33e-404e-ad62-be9013a857d4/comment_calculer_le_taux_d_volution.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/date_a_live_spirit_pledge_apkpure.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffcc36609fd0ee78c2f31/t/5fc1b1ea3485235c86063a51/1606529514640/pennsylvania_ramp_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/735a04c3-b901-46a1-99c0-e0bd9c9cb28e/art_history_5th_edition_marilyn_stokstad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1129368612547ed5f20ea/t/5fc15b47e6d49a06bbc4fc11/1606507337216/chemistry_lab_report_abstract_example.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/zovuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe17323f75b166439d40fd/1606293298683/93886171891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de26f475-e9ed-4333-98cc-94d1238c10ed/dulawepomixetilusav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ef3116eb00e3c49974f/t/5fc35ad1f81c9a2a0c0d0c9d/1606638292318/93141245329.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc670929698b02c7f46b266/t/5fd0492275f5e504856d3517/1607485730666/actor_ted_danson_net_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c21b35-4701-4e19-af5c-00d622c2df38/zesekuzimuv.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB064 5832 bytes
SHA-256: 51200f12f9e211743a9a22a77d1175eceef0b867fa046ccaa6a7a4ed6832d028
font_01_sfnt_off0000c428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC428 9740 bytes
SHA-256: 01343ca457f12cd46d6a93d03c8d0598490bc59897c34a4eff9c3f2abf062e5f

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