Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8b16b4c49c5cdd…

MALICIOUS

PDF

70.5 KB Created: 2021-04-14 03:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9a5344fcd193bdf5f8c9f714a4fb39a6 SHA-1: 071b6f9a9c0a58c84df19e474e1cc5684483377d SHA-256: 0d8b16b4c49c5cddf1ae24435cad755a8b4ecf45efd95b0d614aee2800d892ba
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains multiple embedded URLs, one of which is flagged as benign, but others are unknown and potentially malicious. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous PDF_URI and EMBEDDED_URL heuristics suggests a phishing or redirection attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.guninetwork.org/system/files/webform/heirri_proposals/nuxikovevevugodir.pdf In PDF document text
    • https://web.liderpapel.com/sites/default/files/webform/53484808665.pdfIn PDF document text
    • https://www.natsihwa.org.au/sites/default/files/webform/21073527915.pdfIn PDF document text
    • https://www.enwidth.com/sites/default/files/webform/resumes/lerudaxalopavowurugepoviw.pdfIn PDF document text
    • https://vectorcorp.net/sites/default/files/webform/resume/sowasipaxezok.pdfIn PDF document text
    • https://www.mothercare.ro/sites/default/files/webform/resumes/xigidaz.pdfIn PDF document text
    • https://www.enwidth.com/sites/default/files/webform/resumes/paxifufal.pdfIn PDF document text
    • https://www.woonsocketri.org/system/temporary/webform/kebadewanizokodijixupid.pdfIn PDF document text
    • https://www.telluridescience.org/sites/default/files/tstc-applications/dadesiludidogujuta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=moldflow+design+guide+part+2PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B0 5320 bytes
SHA-256: 2903121550f47e1098118a780eb2728ed3999fdd3634f6c0e6f9449251de1f3a
font_01_sfnt_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 10400 bytes
SHA-256: 5b4cf0f40819be72a75d3fc7d64029e6b652a7edfdae6972ca266714d95299f0
font_02_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e