Malicious PDF — malware analysis report

Static analysis result for SHA-256 d83a8227acaf7497…

MALICIOUS

PDF

81.8 KB Created: 2021-07-18 04:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d095792740725c1bf57409c80e307284 SHA-1: 2bb1d9ecfc8dbd7aa2ede435cd60af0d104a8cbb SHA-256: d83a8227acaf7497d82843a4b3724a23d4c599c2babc87bc34e57a70bef0bc43
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, suggesting it may be used in phishing campaigns to lure users to malicious sites. No scripts were extracted, but the presence of external URIs and the overall detection profile point towards a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/rCno-htTzZk/square?utm_term=3+digit+addition+and+subtraction+word+problems+with+regrouping
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0211cfd683a7867cbd98a/1626349852420/miscreated_interactive_map_2020.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e91701854c1d3b3486a232/1625888513189/13819978847.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1420ac9cf4d40000cda03/1626423818826/zududeriwulagem.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f357cac2d40e67ec0b552b/1626560458190/kupowaloporalir.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edd480e635d7166460af52/1626199168125/82653382452.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f09d421b6907421ded00c3/1626381634473/vozefobepez.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0a688ea7e6f4144892a16/1626384008859/are_apples_good_for_dieting.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7c34c57d2352c927b2ed3/1625801548168/59169042331.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1b6a9dc6bbd633a6227aa/1626453674026/what_does_going_down_on_someone_mean.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee271c1f51426150cb87f1/1626220316893/41825622794.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed9edcc2b60e0ed5b51d6e/1626185437007/kuluzevatibumoxorigas.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0cd767ffd90482e3245ab/1626393974275/golepadawoxejoximuf.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0ab693c307813f1a7c75d/1626385257132/bixejasexukowogapasumexug.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_off0000dcf0.bin
6ebf3723f7984d8f5fe9da05e6c5efc13a927596957a88de0235277aaadc75e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 16704 bytes
font_01_sfnt_off00010822.bin
641548a6fd1442cf38d55fa1a5287aa09d74079f125ccc587a832d8b9798e179		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 11360 bytes
font_02_sfnt_off00012258.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12258 16792 bytes

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