Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd86271042483027…

MALICIOUS

PDF

82.4 KB Created: 2021-03-27 19:23:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb7ad00a834b214319024286e84af66b SHA-1: e6366d080ac517dc7ee5403a0f688ec053f55b21 SHA-256: cd86271042483027133cdfc5fb3ae7e6ad496a98a42ee93f6c131aff61087e3f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a critical heuristic identifying a link farm, suggesting the primary purpose is to redirect users to potentially harmful websites. The PDF's structure and embedded links align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=soul+of+a+citizen+pdf
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/8209908.pdf
    • http://buloshnaya.site/64448840515rh6mh.pdf
    • http://cmb-eco.com/59109789323b42pz.pdf
    • https://valivefeku.weebly.com/uploads/1/3/6/0/136050987/sojejori-tarageda-jilurum-narevofazevem.pdf
    • https://cdn-cms.f-static.net/uploads/4418556/normal_6011a14b9fce6.pdf
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/dekimabazad.pdf
    • https://pivokobofu.weebly.com/uploads/1/3/4/6/134648089/0a1fdbd31b1d.pdf
    • https://static.s123-cdn-static.com/uploads/4369331/normal_5fff930e7db32.pdf
    • http://girameluxo.iblogger.org/80777882255.pdf
    • http://raifaisentapp.online/71733206754n7i2.pdf
    • https://cdn-cms.f-static.net/uploads/4381730/normal_605952a08b6bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vipaviveza.epizy.com/ielts_writing_vocabulary_band_9.pdf
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_ff20576222274ea5ba0c49a70b28bf58.pdf?index=true
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_1bb5f8bf11084b01b986b7164d9f1100.pdf?index=true
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_764b8643ce0d47888e44c56ce6b58c22.pdf?index=true
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_b216be9451e342da982060cdf5edb8ee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5ce45fc9-e91a-4a4e-aab4-51b4476cc012/la_la_land_guitar_tab_bryce_vine.pdf
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_e27dec1d5d61440ab30eb70c2eda158a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/885cba05-96c5-4b57-84db-2dd8d33953d2/risk_measurement_process.pdf
    • 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_off0000f7c0.bin
c7b109eeba7fb89b90716d0444ab9038b44c52f905bfcf5cc3ed40296a3a5c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 4912 bytes
font_01_sfnt_off00010889.bin
5e90a18fc6d6f8195f71affbe6a6241f359de9736789a285759b9f85506bf0f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 10584 bytes
font_02_sfnt_off00012ccb.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCB 4324 bytes

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