Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cedadfef8f950c3…

MALICIOUS

PDF

69.9 KB Created: 2021-03-10 18:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7fd489a65a8115dd002c7eaf35b6208d SHA-1: b0650d3c5cefdce1f7f6f75d7ff5039bb97bf308 SHA-256: 0cedadfef8f950c3aeaa847c6b4663b8f8f2152f50d7e1d1400142034377a253
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://jacksth.ru/wix?keyword=things+tom+likes+pdf', suggests a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded links strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://jacksth.ru/wix?keyword=things+tom+likes+pdf PDF link annotation
    • http://pasendapp.online/darabzb0yt.pdfIn PDF document text
    • http://circus.market/harry_potter_monster_book_of_monstersoqpde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392853/normal_5ffb44a08fb96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_6027cc4a2b1fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_60290be546ccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475719/normal_6040169949489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_6018f6e47c6fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_6036ab4f98e8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/damerirazib/1324822467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab087f23-d9a0-4dd6-848f-095f493e5954/tecumseh_carburetor_float_adjustment_snowblower.pdfIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_0e06c62e56b342c0b8c5cfb7cec17326.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/459540828.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/77788297367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4691fc75-0740-4a27-b02c-42c66bcdd172/marlin_model_60_semi-automatic_.22lr_rifle_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e66e475-5284-4833-a360-f75c7117c4be/how_to_hook_up_krk_rokit_5.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_601bf13d2e14455dbde2c56874b5a4a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db288ad1-2660-4d0d-8354-afd9f6f38324/how_to_become_a_good_leader_in_church.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69925b47-83e6-45d7-adee-d32d98a45e46/95890974716.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/ala_baburao_dj_song_marathi.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_95f790c5d57d48c8815b90f0b19ebc8f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/winumigutam/afib_guideline_2017.pdfIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_0cc272b1f4484557be9cdde481990791.pdf?index=trueIn 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_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 5160 bytes
SHA-256: 500fb64a09506946d147c731f43222da580648283ecea7d54b0a761df37c5334
font_01_sfnt_off0000e698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE698 10504 bytes
SHA-256: cf0e00e1058d6366288175f8728baa23e25b5823f61f8af5af5def4163813907