Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5c3f054de7ea65…

MALICIOUS

PDF

86.2 KB Created: 2021-07-22 01:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d155d2e0c460fbb5f50f7c2189590f86 SHA-1: a0ac713946c8000f6f0f3e9592ab835aeee3fdb0 SHA-256: ea5c3f054de7ea653c7af053824db54d85450389292f1a39ceebd5792a00815e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, while currently marked as benign, is indicative of a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/iCUEKX862tE/square?utm_term=bacteria+which+fixes+atmospheric+nitrogen
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ede519ad58ca03d227a5a7/1626203417943/after_one_direction.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f72d30281767412c9e75f9/1626811696214/91189287937.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f45970b84a576e6c0a458c/1626626416805/except_clause_in_sql.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2643e1434f635471a7227/1626498110861/take_me_to_the_moon_and_back_lyrics.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8b59ff9c8b53cea33bd1/1626114905593/54760548736.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e870080c43fe23627f1730/1625845768357/wapakiwig.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f8287b2544fe7abc3304e3/1626876027298/bunumo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f05d483159f50439c7f8c2/1626365257028/kuwemakigawon.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f76fe1f8cb03404062d7f2/1626828769877/great_brain_teasers.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5e94d9aaafc411be98b22/1626728781421/what_does_legally_mean.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f24ff2e13ee97666fdc8d2/1626492914202/800_meters_how_many_miles.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f076014bddb81875f19b0e/1626371585817/where_do_you_get_it_from.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8101b4454ab0ddd87f750/1625821211692/90s_cafeteria_food.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f7faceca10327b0ca21853/1626864334641/66780791574.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f86164a1c0e4242c6fa2b4/1626890596352/institute_of_psychoanalysis_events.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0478ebae8d04216d9f643/1626359694873/962312030.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7708d5a6a8d402455bbab/1625780365778/typing_test_near_me.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f89148b640d10afb007bbf/1626902856480/zofikin.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_off0000ec25.bin
8d4c64ccccebbc267265acf7ee46b6b10a568eec93b42dcaa21ca780589ebb8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 11120 bytes
font_01_sfnt_off00010616.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 16792 bytes
font_02_sfnt_off00011e28.bin
042df1262a7522b43dd531aa5836c683de774366b1d5a5cec57e26aa72e83dd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E28 16956 bytes

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