Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d50b2b2ba6176bc…

MALICIOUS

PDF

93.6 KB Created: 2021-05-06 14:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 801bd75cebf1f2f282f80cfa8096d155 SHA-1: 2027665b1ea25e5cbccfdba1cd3725afd0d84869 SHA-256: 8d50b2b2ba6176bc097a09ddf1faca8b83a594f92cc4e3984df33977217c909f
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are disguised as search results for specific documents. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs are the primary indicators of malicious activity, likely leading to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=2013+ashrae+handbook+fundamentals+pdf
    • https://goporurozabi.weebly.com/uploads/1/3/0/8/130874573/xepodesolo_muxewixidu_bukifu_kixezokak.pdf
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/vapawotovikuzulalim.pdf
    • http://idealslim-ordina.site/hard_bible_trivia_questions_and_answers_new_testamentzg50y.pdf
    • https://xejotonevuxujuj.weebly.com/uploads/1/3/1/3/131379732/4424263.pdf
    • https://cdn.sqhk.co/pabilere/hi8Imjf/52381281222.pdf
    • http://thefortykuti.com/what_plc_programmingyl6wy.pdf
    • https://cdn.sqhk.co/xixumobun/jNj8ibn/vhl_leccion_1_contextos_answers.pdf
    • https://cdn.sqhk.co/jerowerar/ehvjdie/diwuwifokebofu.pdf
    • http://helpverifybadges.com/focusrite_scarlett_2i4_gen2_review5ap36.pdf
    • https://cdn.sqhk.co/tixukiko/mjhMje2/minesweeper_solver_app.pdf
    • https://cdn.sqhk.co/jabuvilir/iejhlih/gegakalanagikuvijamifu.pdf
    • https://vixekilawuta.weebly.com/uploads/1/3/4/3/134305586/mopuvuzogezazog.pdf
    • https://repemokalit.weebly.com/uploads/1/3/1/8/131856723/98e1d1523dd4e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wupixufekijax/kobuposujovojijetap.pdf
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_ecefc4f1412b48f6bfd8f4926d9533e4.pdf?index=true
    • https://s3.amazonaws.com/gimufesajo/new_odia_album_dj_song_2018.pdf
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_95b5f71befdc4f1d9341d3aa59ed1885.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e88.bin
fe69ab1ede2b02966530f1330971c18f7cf360e7578fb589948db2cb185f3d00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E88 5716 bytes
font_01_sfnt_off000131ad.bin
159faf6ec0ee9e40bc12d65b87d9834d081878b5b7cfe1341acd082e134fcaae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131AD 11480 bytes
font_02_sfnt_off0001590b.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1590B 4324 bytes

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