Malicious PDF — malware analysis report

Static analysis result for SHA-256 7537c0cde453aa6f…

MALICIOUS

PDF

202.1 KB Created: 2020-04-23 08:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ef9b43be19269e31c351c7fa62514a4f SHA-1: f954996ce53a2e26623fe4508e7b75b01b91003d SHA-256: 7537c0cde453aa6f66b5b5b57c7b407da928fc7dd735eb7c99b938915b50f8a7
116 Risk Score

Malware Insights

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

The PDF contains heuristics indicating an advance-fee scam, presenting a lure of a lottery prize or funds requiring parcel delivery fees. It also contains multiple embedded URLs that are likely part of the scam infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a malicious intent to defraud the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6565

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://michelleantus.com/uploads/1/3/0/7/130740212/130740212.html#answer+please+meaning+in+nepali
    • http://fatimaschoolmonroe.org/uploads/1/3/0/7/130776779/1990846.pdf
    • http://almgrenlandscapedesign.com/uploads/1/3/0/5/130543212/bodur_folepowogek_sorazus_torejuwovewi.pdf
    • http://cmpcleanings.com/uploads/1/3/0/6/130620804/gukerasi.pdf
    • http://annejacobschiropodyandpodiatry.com/uploads/1/3/1/4/131453793/falibigem.pdf
    • http://technicaloffice.org/uploads/1/3/0/9/130969420/vekovona-nivuvonotejiwiv-palojerolix-migoxuxadaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002af7c.bin
de7c8c54d35d265f2c6de20e69a862ab84c6113983ee21155967e865a642e8ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF7C 10544 bytes
font_01_sfnt_off0002d5c6.bin
63f5e27ee3d24cc00d413e59c301cc73ab377383609796993547673f2bea898c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D5C6 2600 bytes
font_02_sfnt_off0002def2.bin
10785f920e46fafe47ed974beaf16efcd53ffdf28822848d9b56843616faadc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEF2 16536 bytes
font_03_sfnt_off0002f56b.bin
d265f884000b0047993baa4b96720c7e7c249279fa24d984f992b074dce40c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F56B 12636 bytes

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