Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0af14131ef5d27…

MALICIOUS

PDF

97.4 KB Created: 2021-07-17 04:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bf95cfeab4a7f5fd84766f0900a5971 SHA-1: 25d42662c281ef3dbf11b6a98bf51f421b49f66f SHA-256: be0af14131ef5d27655feefaa61ccbe04e353e0e3f40359aa0629755bba7289b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to direct the user to external resources. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/qQn0o4eTdIQ/square?utm_term=arsenic+contamination+of+groundwater
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f5e38ce0e10532d0ead4/1625880036014/how_to_undisable_iphone_8_plus.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f10a07347a2e2c84fe4b19/1626409480051/learn_touch_typing_online_free.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f203d472a6757b3ff5e075/1626473428316/4122512699.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e837456e46386ca3c46fa8/1625831237348/all_codes_in_muscle_legends.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f04c53a3037a757556e33e/1626360915603/who_is_the_killer_answer.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed91149db072196a241fe0/1626181908726/birth_control_protection.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee06a2e6792c2552bf3e83/1626212002565/12407707374.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ede0f5537dfa200404da12/1626202357629/32625995788.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2144aebca9b5ae8de7e8a/1626477642323/5048868167.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f01cbcb3de5a36b127ff46/1626348732725/the_happy_short_life_of_francis_macomber.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e87f3d7dda7f41418c013d/1625849661884/test_your_professional_english_law.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee818384a0477e84af1748/1626243459631/data_and_computer_communications_10th_edition_william_stallings.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8218e46a8e17713e77e1f/1625825678325/gisagiwokepasonibumilofo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7e33da3609a707bac6adb/1625809725758/torunazixo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1b56fe884c975dcb02fc4/1626453359649/47396017204.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e79b259bae382bbabb9b53/1625791269426/being_righteous_means.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_off00011a8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8A 16792 bytes
font_01_sfnt_off0001329c.bin
0ecd504731d417d50579451fe1852bd7e72c4812eb6a92491e21d289ec3aedb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1329C 17260 bytes
font_02_sfnt_off00015fd3.bin
a27250bf499cc4ee009615a189180a0dd434ee32071415750e6776f9e2b21818		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD3 10940 bytes

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