Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced3b5115328d094…

MALICIOUS

PDF

83.1 KB Created: 2021-03-03 02:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9b65197384693d7d41106bbb0e1cd67f SHA-1: 7a4882164a830ecc50d0cb8376324410ac924c81 SHA-256: ced3b5115328d09427b3f9f6e1f21eba0be90d9b2674e923741edff4ddbb5925
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to a book summary. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/award?keyword=the+raven+cycle+book+2+summary PDF link annotation
    • https://cdn.sqhk.co/botuvawezej/0wjhAPc/sobexumirozilidudamefepi.pdfIn PDF document text
    • https://kibidabusiben.weebly.com/uploads/1/3/1/0/131070702/9721083.pdfIn PDF document text
    • https://mujabimebedegi.weebly.com/uploads/1/3/4/2/134234846/4180270.pdfIn PDF document text
    • https://zuzuvisaze.weebly.com/uploads/1/3/0/7/130738998/2afb27239efe.pdfIn PDF document text
    • http://vazukororupob.22web.org/satir_iceberg_model_explained.pdfIn PDF document text
    • https://menusopam.weebly.com/uploads/1/3/4/5/134597334/07a70d974fe.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/6789899810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jeloneliva.epizy.com/pimupirexevalirazepowimew.pdfIn PDF document text
    • http://temefolix.epizy.com/gimafafufu.pdfIn PDF document text
    • http://duvodix.myartsonline.com/tolunuzegej.pdfIn PDF document text
    • http://porujikegen.epizy.com/ielts_listening_8_test_3_answer.pdfIn PDF document text
    • http://duzesonugineku.rf.gd/el_almohadon_de_plumas_resumen.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/gigedutuwimadedilodu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 5240 bytes
SHA-256: 72dbf5317ff554c1af74fcc4c43c198dad66b9fc5f64ae030c87b438da7a88ca
font_01_sfnt_off00010ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 10088 bytes
SHA-256: 5f1a01c9381501e0da90d03021b8cac0c4392ceae6c3a6576a261aff04d6b842
font_02_sfnt_off0001315f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1315F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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