Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0eb542ccf101a6…

MALICIOUS

PDF

78.8 KB Created: 2021-05-06 04:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 187c62f7d1df46c92789d21c93d2e5de SHA-1: 43600a39caa5e9d3c71f2179b58e9c4a2df207f8 SHA-256: 0e0eb542ccf101a61038a1ffbb578cb5cf01cb267e39f7aae01b515a7dcdafbe
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, pointing to various PDF files hosted on platforms like Weebly. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the structure suggests a phishing or malicious link distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/fabufob-lemisowipuxofe-busitovobofulol-kekazibobitixom.pdf
    • https://xiduzejeg.weebly.com/uploads/1/3/1/6/131606953/8d938c2.pdf
    • https://kimimidinom.weebly.com/uploads/1/3/1/4/131453749/abc8a3b08d35d.pdf
    • https://katidifivova.weebly.com/uploads/1/3/4/7/134715674/delolepipidexabexime.pdf
    • https://zeduxuvanoripi.weebly.com/uploads/1/3/0/7/130775880/870f71665e4e2.pdf
    • https://xelopapet.weebly.com/uploads/1/3/0/7/130775154/4514528.pdf
    • https://mopirolelawa.weebly.com/uploads/1/3/4/0/134012876/8b606232475b.pdf
    • https://tevukebejesa.weebly.com/uploads/1/3/2/6/132695492/votixovuvuv_janamixuxerug_guzusaj_golitadem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://feedproxy.google.com/~r/wb/ENAH/~3/Ecv9gJ3Ok6E/wb?keyword=my%20fx%20choice%20reviews
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_c4a7aa11f533455a9729ed425fd8ca89.pdf?index=true
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_54b9f0f94aff49fbacdbff5867b4b98a.pdf?index=true
    • https://s3.amazonaws.com/nimuwet/autopsy_report_template_google_docs.pdf
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_b7d93e869f004bc291496c35fb0509c1.pdf?index=true
    • https://s3.amazonaws.com/fonibinaraj/ribenelized.pdf
    • https://s3.amazonaws.com/viregujipowuru/dudikonutazokikajarerop.pdf
    • https://s3.amazonaws.com/gafedupeba/annual_salary_review_spreadsheet_template.pdf
    • https://uploads.strikinglycdn.com/files/24ca6418-fa9b-4045-bf1f-3a34b0653a22/60151286411.pdf
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_4ccf595d18c445cc9b8c3408163e89ba.pdf?index=true
    • https://s3.amazonaws.com/tesapibebujep/jaruk.pdf
    • https://uploads.strikinglycdn.com/files/a42d4e49-4da4-4261-9932-26885e61885e/gazomuxiwumesizegidoxed.pdf
    • https://uploads.strikinglycdn.com/files/b8b42e68-e5c5-4f87-987a-bb4988a35bc7/momovu.pdf
    • https://s3.amazonaws.com/xopugup/linear_equations_word_problems_worksheet_kuta.pdf
    • https://s3.amazonaws.com/vetamedisoz/nodurejezuze.pdf
    • https://uploads.strikinglycdn.com/files/d1882187-ed94-4858-9a0f-1eeb2958d317/luzinazuriwawutofupobab.pdf
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_037048b3013846fe91d017f96289abdf.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_off0000e9d8.bin
781b11d24d3d0b763cc11e43be4629aa50180944056698683f88c3de8e9d76a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 4656 bytes
font_01_sfnt_off0000f9d5.bin
0b0544713fb009ab5736023f5c6784ee20ffa768b3622fded285686755763a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 11180 bytes
font_02_sfnt_off00011ff5.bin
781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF5 4324 bytes

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