Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4f21202a737c1d…

MALICIOUS

PDF

97.9 KB Created: 2021-07-18 00:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c587b0f6beac06505e2a01d5cd0d5cc6 SHA-1: d8d83a1c61671c58d83170a3c38db1fc0c8c0fb6 SHA-256: 6d4f21202a737c1d67fe92af3faf228bc328e4c5118bb1601bc08d30c1fdc5ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect the user or download further payloads. The PDF structure itself shows signs of manipulation, such as duplicate object bodies, which is common in exploit-laden documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

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/razvivatel/yapz/~3/UQ8tT55rDuk/square?utm_term=remittance+meaning+tagalog
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0e24a1f3fa43bb6b5703b/1626399306281/are_plants_consumers_or_producers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3479027519501fc1185e4/1626556304958/naxupupimupo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f34abe8c10a93e504d2ac3/1626557118334/the_abominable_snowman_from_monsters_inc.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f3460722602c08caef8824/1626555911971/how_to_reheat_grilled_cheese.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec81234027437375963cc2/1626112292071/cheese_high_in_purines.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f2f08522602c08caeb150a/1626534021730/41880179794.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f158e3e7c78223958aa3e2/1626429667580/2k19_ppsspp_highly_compressed.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec93517b14134336ddf560/1626116945494/93732252308.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ab1b261b7f2579ab5a2e/1625860891935/fijimub.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011290.bin
ee4da7d5a7b6c5194a9ec64141ef4d7d7ed1384592e35a3332b8aeeee0d93fb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11290 10348 bytes
font_01_sfnt_off000129f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129F0 16792 bytes
font_02_sfnt_off000141fd.bin
5bb4e13abd89106426c8c874554fecbb08142bc2a53b8e9b8bf6acb11f666fa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141FD 2080 bytes
font_03_sfnt_off00014b3a.bin
3595a647ec08b2b37ab53985073e26ece76b466a8587629139f6e082b16266d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3A 18228 bytes

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