Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31f3e5f2aa16146…

MALICIOUS

PDF

75.8 KB Created: 2021-03-20 17:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0204132fb2538e603cd74ea729617814 SHA-1: 70eda3edfc6c6f5237bd633f52c0b09164018c7f SHA-256: b31f3e5f2aa16146569cb9b98d6a0d593c71e757b3a94e4a250e2aaa430f0007
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to software manuals, aligning with common phishing tactics.

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://pelibifir.ru/award?keyword=traktor+scratch+pro+manuale+italiano+pdf
    • http://pefiworawodud.mypressonline.com/how_to_love_thich_nhat_hanh_free.pdf
    • http://kanaxade.mygamesonline.org/tissot_t_touch_connect_solar_malaysia.pdf
    • http://gozimudowojuzun.mypressonline.com/98918884684.pdf
    • http://tesazidon.22web.org/62459059842.pdf
    • https://diwodineguxep.weebly.com/uploads/1/3/4/3/134305573/8696813.pdf
    • https://cdn.sqhk.co/gidagolusi/bicihic/makonijepax.pdf
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/5041181.pdf
    • https://cdn.sqhk.co/fowipovoji/ibiaia5/97041492519.pdf
    • http://mazejofeg.mygamesonline.org/verb_to_be_affirmative_form_exercises.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juliziwojatige/architekten_des_westfrankenreichs_anleitung.pdf
    • https://uploads.strikinglycdn.com/files/588a2bff-d21f-413c-b8de-b3665fd344c2/aqua_logic_controller.pdf
    • http://saxodanokijaj.atwebpages.com/how_much_should_i_charge_for_writing_a_500_word_article.pdf
    • https://s3.amazonaws.com/fipijife/78823856228.pdf
    • https://uploads.strikinglycdn.com/files/380ef4d1-7138-493f-a663-2d39c1260197/progress_in_mathematics_grade_4_student_textbook.pdf
    • http://jibogifimot.epizy.com/wolipetekejuwasakavevuzek.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_off0000ea4e.bin
b2ec6d1a1433370af68086b7e3ecb17b6439368208953e6e30d3bb524d72adf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4E 5408 bytes
font_01_sfnt_off0000fc87.bin
658a93f186902c2de33104f62cb081d2c25014c4f4e7cc767cd54e4b09c8dfe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 11076 bytes

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