Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4dd955e3f06e02…

MALICIOUS

PDF

74.7 KB Created: 2021-03-11 07:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd78a7f3f86f8391fa1c1303700dafc1 SHA-1: fb441845479b210d1fc4da4dab0cc557b37c00db SHA-256: 3c4dd955e3f06e029c262971a584f9e3378a6d2cf7b5b51e9ae70349d579172e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a suspicious domain, likely intended to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to 'boat origami instructions'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jottigo.ru/award?keyword=boat+origami+instructions+pdf
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/d6d8fd52ad6a0b.pdf
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/5996719.pdf
    • https://cdn-cms.f-static.net/uploads/4384035/normal_6021c0467347b.pdf
    • http://borejukeluteva.mygamesonline.org/suruwetakop.pdf
    • https://tibagikusutugox.weebly.com/uploads/1/3/0/7/130775046/xagadagaxe-gogaso.pdf
    • https://sobopagep.weebly.com/uploads/1/3/0/8/130873740/fugurumuxus.pdf
    • https://cdn-cms.f-static.net/uploads/4492901/normal_5fd969279f593.pdf
    • https://sinuvofibudibaf.weebly.com/uploads/1/3/2/6/132696377/deribepegobuz_lagevuvom_junixu.pdf
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/luwavoti.pdf
    • http://budofibo.mygamesonline.org/financial_administration_act_of_ghana.pdf
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/wumipokoxu-ziwefanuz-jukup-ganozunoxupu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/57021d80-f8e9-4404-9aa4-951b3da78e17/42651559559.pdf
    • https://uploads.strikinglycdn.com/files/67293ce4-f5e0-484b-8672-60d31757b091/kowilubamipipabatirar.pdf
    • https://uploads.strikinglycdn.com/files/b86b1178-0d28-4c55-b629-fc89bcee0bbf/construction_site_office_manager_job_description_example.pdf
    • https://uploads.strikinglycdn.com/files/04b859df-7ec1-4285-92f8-7f2e63495b09/14058811494.pdf
    • https://uploads.strikinglycdn.com/files/db1909be-7814-4ddc-94df-07412cfe8c25/igloo_3.2_mini_fridge_reviews.pdf
    • https://uploads.strikinglycdn.com/files/1ea8504d-2d91-4c7d-a4a0-50ea4571f583/descargar_el_secreto_ley_de_atraccin_documental_libro_completo_espaol.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fb.bin
e89fb0ea3be3c344a30a58036a724a36a3f6e07a866f2485b6a6ee016b7fec31
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FB 5492 bytes
font_01_sfnt_off0000f99b.bin
66600a411708bfa42368cdfdf18ba8c3a80d80562efa38613cf97a46d763e921
pdf-font-stream PDF embedded font (sfnt) at offset 0xF99B 10592 bytes