Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f49d36efa437f05…

MALICIOUS

PDF

74.4 KB Created: 2021-04-02 14:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 842d46f857f056e273a778ade193b0e1 SHA-1: eee90fd343792ad1214c3d59a28e95c96e30913e SHA-256: 5f49d36efa437f053b0b0b091daa5784c4a5aa62e1024c8ae14feecec6eba407
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The presence of a malicious URL and ClamAV detection further supports its classification as malicious. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to lead users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/123?utm_term=chaska+song+ringtone PDF link annotation
    • https://lutapusudifo.weebly.com/uploads/1/3/1/0/131070527/2676247.pdfIn PDF document text
    • http://dayzcommunity.info/not_a_one_way_street_meaning9s0y0.pdfIn PDF document text
    • http://yourcy.com/21940016195y9ffn.pdfIn PDF document text
    • http://power-guard.shop/waduwewuterotajubu7nn1a.pdfIn PDF document text
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/zojojaxesex.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/b66a4163-69fa-4ecb-8691-726e867fb571/5768314137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b01260-5b30-4d24-9d35-0eedab0b8d14/como_son_los_sintomas_de_la_neuralgia.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/divowukinerofepir.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_f36d8d2cd06e48e58ebae7530bc79deb.pdf?index=trueIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_c16a900d7dec45fb8675337784c04bcd.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_c41da3975e31408d8712d76089a5c9ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kufazete/juvazitenezemewevik.pdfIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_b74791569fd84b489b21698ee2c63f1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/selling_portrait_drawing_online.pdfIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_547f0a1e5a03403b9bfd86f99cddfef3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/pelozukiremelegu.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_ee1565521b6346f182ecc6f25903aaa9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/435df9f2-25b8-4774-a0b9-352ef61bc09a/hayward_t_cell_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/puzipujugukivakegi.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_off0000e5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 4884 bytes
SHA-256: b305bab3a6cf7147f491e1d656ee32f326587c663a0a9418a3783c71e86f0b27
font_01_sfnt_off0000f67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67C 11224 bytes
SHA-256: 5d83bde2ddc55e0d10c3223e968050df20503d722ce60ec957c2cd3cd547c81f

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