Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c52022f369bdb3b…

MALICIOUS

PDF

79.3 KB Created: 2021-04-12 17:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d7d04c06505bce034ac3689416669cc8 SHA-1: 8fd649010d95d96bf4eee03b253e76661aeec936 SHA-256: 5c52022f369bdb3b8862c6bc1200f478d3f998e9a2c2499b7c0efff37ee3d53b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://pelibifir.ru/strik?utm_term=view+browsing+history+on+samsung+phone PDF link annotation
    • https://febujexiliwe.weebly.com/uploads/1/3/3/9/133986913/mowokowekuxofi_xobeta_vekozuxusiv.pdfIn PDF document text
    • https://sonefexezeripu.weebly.com/uploads/1/3/0/7/130739000/magofimepafin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_6026afc9ba57e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_604a5fa66c54b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_6038e6861e029.pdfIn PDF document text
    • https://vakejijumusefuv.weebly.com/uploads/1/3/5/3/135313512/mezusidigexomumalag.pdfIn PDF document text
    • https://noxolawozin.weebly.com/uploads/1/3/1/4/131452883/7302913.pdfIn PDF document text
    • https://najijufo.weebly.com/uploads/1/3/4/7/134714833/lopitase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_6023ff6169989.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/vofadoloves/45156546651.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_805a299256404231a4166bf6b8c751e0.pdf?index=trueIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_a80655ca9d8e4de2b83dbb16c7a38305.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/weber_spirit_ii_e-210_3_burner.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/what_to_say_about_your_background_in_an_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/deck_the_halls_sheet_music_choir.pdfIn PDF document text
    • https://24976a62-ea59-4ca6-8500-d0bd08f9a094.filesusr.com/ugd/65a075_08b4efdd6a99419e9a2b21b29ed47afe.pdf?index=trueIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_146a4f8f910f418a91c6e9c510879a4e.pdf?index=trueIn PDF document text
    • https://ac6a5e95-3fab-4d4b-a7e7-0ef4c71e5929.filesusr.com/ugd/32c278_95f4e03876b043289d4d62ac188daffd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/gb_whatsapp_new_version_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/teoria_de_las_inteligencias_multiples_definicion.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_fbe9e651fdfc4a6c8be2b615b60bc888.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazawojob/kirby_vacuum_sentria_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/kabolotumatewofuwaz.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/agnipath_video_songs_mp4.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_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 5500 bytes
SHA-256: 3eacf79c198fcb265addff039b474846b1913fde0dd90acfa630c96e8845d643
font_01_sfnt_off00010b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B16 10744 bytes
SHA-256: 136c86ccccc1ad57e0f948e8927c7e5488511d8fe52dfbadd25e32424d0d3ce6

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