Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2e1257a837036c…

MALICIOUS

PDF

74.4 KB Created: 2021-04-21 00:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46c9725c4c75b2c7fcc9ffe2ed602fbe SHA-1: 7cdd424bcf1927241fa90ed953cc50dd2a6e898a SHA-256: 6e2e1257a837036cd140622f1f2983ac5ca489fe76cb83339def5fbcad15b797
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, one of which is a known phishing lure, suggests a social engineering attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing campaign designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ambrose.edu/sites/default/files/webform/11364316539.pdf
    • https://ambrose.edu/sites/default/files/webform/talizovub.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/xaduxiwipel.pdf
    • https://ambrose.edu/sites/default/files/webform/58234525485.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/nojezajewi.pdf
    • https://www.a1touchsolution.nl/sites/default/files/jonalizavilivoduse.pdf
    • https://web.liderpapel.com/sites/default/files/webform/21411595718.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/86303695333.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/goxara.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/74795851198.pdf
    • http://portal-mysigma.com/system/files/student-proof/72808970040.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/71502920023.pdf
    • https://ambrose.edu/sites/default/files/webform/61391242106.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/85322732160.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/pidefukil.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/ponezilineg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=bartle+measure+theory+pdf
    • https://campusrec.princeton.edu/system/files/webform/jelozubunumi.pdf
    • https://lib.asu.edu/system/files/webform/dilitopuwivane.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_off0000e4c6.bin
ad1c5a3bb02e4bab9649b754f513f4d9c20fddad0504da181a5e851f89bdbdb2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C6 5432 bytes
font_01_sfnt_off0000f71f.bin
3661c0520164d2cfe0688d4b666869ba6117b3a50766f286a3a940757b245a91
pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 11120 bytes