Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ba48b8f3d2e403…

MALICIOUS

PDF

135.1 KB Created: 2021-04-11 10:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 152eba89823021f242338715d4fda28a SHA-1: bd4af4381593aee662154e04665083e1233f386e SHA-256: 52ba48b8f3d2e403b9993f83b0edff7ffae4adb6e36fe3a34ea40c506c92fc20
96 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is flagged as benign, but others are unknown and could be part of a phishing or redirection scheme. The presence of PDF_URI and EMBEDDED_URL heuristics suggests the document is designed to lead the user to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.jwico.com/sites/default/files/webform/47965191786.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/bekam.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/tuwagamutavuvefofufeniz.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/86947183128.pdf
    • https://architecturaldesigninc.com/sites/default/files/72694480293.pdf
    • https://www.jts.org.jo/sites/default/files/webform/1653940235.pdf
    • https://www.jwico.com/sites/default/files/webform/23528315583.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/32056102714.pdf
    • http://www.pacificsportfraservalley.com/sites/default/files/webform/12938533755.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/gurasijam.pdf
    • https://aboss.by/sites/default/files/webform/89266631471.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=kimya+%25C3%25B6dev+kapaklar%25C4%25B1+periyodik+cetvel
    • https://lib.asu.edu/system/files/webform/dilitopuwivane.pdf
    • https://gradfutures.princeton.edu/system/files/webform/xafuzekimizitigemuseli.pdf
    • https://lib.asu.edu/system/files/webform/53252105934.pdf
    • https://www.healthdata.org/sites/default/files/resumes/58023923203.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bba1.bin
4734a36186d27fbb6819e7384b811a9490f1324910b97222149791d8ec5c42e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBA1 5408 bytes
font_01_sfnt_off0001cdbe.bin
1de995d920e61201bf5f3b8fa127b87569ba036b7085c9e4758b24c9e7a8c55a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDBE 12876 bytes
font_02_sfnt_off0001f621.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F621 16204 bytes