Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5e1d8f9f582fa3…

MALICIOUS

PDF

76.8 KB Created: 2021-07-15 21:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 106d097f4fe2d9f7915164ee50e49679 SHA-1: ad305469c266de8608ce00531cb71f3072059a13 SHA-256: 0f5e1d8f9f582fa3bb908a850e0b1ecad6c21119a8a8d274871c076009786ffe
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries or parcel deliveries to trick victims into paying fees. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving embedded exploits or malicious links. The presence of external URIs suggests potential redirection to malicious sites or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://feedproxy.google.com/~r/sq/ugae/~3/v-xubMviL4Y/square?utm_term=prevention+is+better+than+cure+tagalog
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e775b64a7cb73218dc923b/1625781686962/95013150514.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee2176b82b3047685e4e85/1626218870277/79247125737.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee8f6d39b82603386e8c28/1626247021163/ncaa_athletes_should_not_be_paid.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed8d87bc9b4721000eccb1/1626180999407/boraxenevu.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://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_off0000c993.bin
3f0c7bbaf0a0cfaff3b4c901fde6e6113f4b663a9b5fdf360d8de4b46e987876		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC993 10816 bytes
font_01_sfnt_off0000e281.bin
b2158bcb0dd1aaa98ffad409f8a3f48ee6547025ceffc6e28638fb9c7f15a1df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 17080 bytes
font_02_sfnt_off00010f1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1F 16792 bytes

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