Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd45b7cf8a0d2d57…

MALICIOUS

PDF

165.3 KB Created: 2021-07-13 18:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 87b0539bf5b629c0ad7ede2bf843fe7c SHA-1: cd77f978621c2c1048dabd238d2f01d82098858f SHA-256: dd45b7cf8a0d2d57339efc73fe04384c10fc0b8dfd9d30cda532929c76e50abc
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV, indicating a phishing or trojan threat. The PDF_URI heuristic identified an embedded external URL, which is a common technique for directing users to malicious sites. While the document body is heavily obfuscated, the presence of embedded URLs and the ClamAV detection strongly suggest an attempt to trick the user into visiting a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier clean score 0.0331

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://feedproxy.google.com/~r/sq/ugae/~3/v-xubMviL4Y/square?utm_term=usthad+hotel+background+music PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed9119cdb2ce13c5286fc6/1626181913609/talcum_powder_scratch_with_fingernails_too_small_crystals.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eca2f35338e9546e4a0a54/1626120947594/device_migrated_external_hard_drive.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed14a666c2900cf55d1a3b/1626150054624/gefobigefavulamo.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed947c573bc4731c88b32e/1626182780769/sorefetefanivijepes.pdfIn PDF document text
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE45 11156 bytes
SHA-256: 32b19a2efe6c14cd10a0bc0ebb1d44959bd485a2eabfc4cb9b4fbd0578d44932
font_01_sfnt_off0001f7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7E9 16216 bytes
SHA-256: 8c2e9d80d580d08964a5048de7b59c27befd741f1c379efd0abbd599686b3e88
font_02_sfnt_off00020d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20D96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000225a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x225A8 18856 bytes
SHA-256: 060f1ddfd767ae194954b289a45b785fcc2dbdf1dc357e7c40716e324f078e3a
font_04_sfnt_off00025708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25708 16100 bytes
SHA-256: 78c506024fb9de42d56e5d58f79ec0da93ff6eb51bd904c152488657ab8142e6

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