Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2017faa32309ec2…

MALICIOUS

PDF

78.0 KB Created: 2021-07-16 09:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b28328ab471b48c4c0763342ec988dbc SHA-1: 72ea9dafbb2e96db43c58c4bf7b1a212c8531e93 SHA-256: f2017faa32309ec2754f35ecd39d71c6bb0954d973168830b856f1f8989ea721
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains an embedded URI pointing to a URL that, while currently marked as benign, was associated with a search query for 'minecraft apk full free download', suggesting a potential lure for users seeking pirated software. The PDF structure itself is also noted as having duplicate object bodies, a common obfuscation technique in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8740

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/pL_UGxDroB4/square?utm_term=minecraft+apk+full+free+download
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e92499e370ac6322891b37/1625891993228/old_song_new_version_mp3.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8fcf243eac6055cfc814/1626116047951/korofubigiwinasemanakine.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb2541a2ce466740df750/1626190420407/intraday_trading_for_tomorrow.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8776fb9ca6543b7adabb7/1625847663758/surabosibi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edb5fd262c1d4011372571/1626191357654/71270389115.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ee040a287971af97ab29/1625878020809/5403002792.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_off0000d443.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD443 16792 bytes
font_01_sfnt_off0000ec55.bin
39a414af1779176657f46d3c6a25523c1553076f7813bd7364eda0c0e19a33b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 15448 bytes
font_02_sfnt_off00011388.bin
20c27373c5b969b36aa9e491f10e010dd4b5a6c6737a2e19e619a04623c8449a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11388 10716 bytes

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