Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d72834c490d4d73…

MALICIOUS

PDF

68.1 KB Created: 2021-05-23 07:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a50771b4d397f9e120972977a6137ff SHA-1: 455d498e09c252d9af0649f1b602d14f38b3f35e SHA-256: 2d72834c490d4d73994faaaa97f5211e4b6dd61b925d244dd9fc4fe22a5a812e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV specifically identifying it as a phishing trojan. The embedded URL is likely used to deliver a malicious payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://midufefew.ru/wb?keyword=desarrollo%20humano%20papalia%2012%20edici%C3%B3n%20bibliografia
    • https://fojakodi.weebly.com/uploads/1/3/1/3/131379163/tumamelojedi_gedusulaben.pdf
    • https://cdn-cms.f-static.net/uploads/4390051/normal_601b2cd66c4d2.pdf
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/0d417b980.pdf
    • https://static.s123-cdn-static.com/uploads/4444100/normal_5fed09fce35d3.pdf
    • https://cdn-cms.f-static.net/uploads/4443356/normal_604d25384a89a.pdf
    • https://dipilewojariwu.weebly.com/uploads/1/3/2/8/132814651/a235f952d.pdf
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5ff5d9d6c0d9c.pdf
    • https://mixutuxo.weebly.com/uploads/1/3/4/6/134692071/vodasigagu.pdf
    • https://static.s123-cdn-static.com/uploads/4497638/normal_5ffcb9f8377a3.pdf
    • https://cdn-cms.f-static.net/uploads/4382189/normal_600c46135e068.pdf
    • https://static.s123-cdn-static.com/uploads/4483587/normal_5fe345cd478b5.pdf
    • https://pebetojakudasud.weebly.com/uploads/1/3/4/8/134879391/jumumami_lumorukewalikel_todoke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e47fed23-214e-41b4-a017-34c4fd9666d8/did_jefferson_win_marbury_v_madison.pdf
    • https://uploads.strikinglycdn.com/files/67c4f46b-6422-4806-a039-ac9550d0f6f7/pubesavesadivetawixunow.pdf
    • https://s3.amazonaws.com/faluzotixupi/sarakaketuzinaget.pdf
    • https://s3.amazonaws.com/lepefi/casio_gzone_boulder_battery.pdf
    • https://s3.amazonaws.com/setaxilitozuko/how_to_install_directv_app_on_samsung_tv.pdf
    • https://s3.amazonaws.com/vesubodufisi/crioterapia_facial.pdf
    • https://uploads.strikinglycdn.com/files/e6897916-e5dd-43a9-bdee-d065d9a35cfb/87968916571.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_off0000c70a.bin
cc1337ec947182d5ac8264aa173692dd3183dac7b9375aa41e9ff0dc84ca1475
pdf-font-stream PDF embedded font (sfnt) at offset 0xC70A 6028 bytes
font_01_sfnt_off0000db2e.bin
92e35af452151fe2a3cc6eba645eac6b9d3c0526199c0aa23f47bb6b136bd990
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2E 11420 bytes