Malicious PDF — malware analysis report

Static analysis result for SHA-256 a791af8c19c3e10b…

MALICIOUS

PDF

84.2 KB Created: 2021-07-22 18:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b76521c7f8acf2c694fa7a38084a7cd0 SHA-1: 7196853efe0894f54256d9ec7d840b9034a1439d SHA-256: a791af8c19c3e10b58b57aa9454764e637d23309db045b31ca8d009bc7e4dd90
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate the presence of external URIs and a visual download button, suggesting a social engineering lure. The ML classifier strongly supports the malicious verdict. While no scripts were extracted, the overall pattern points to a phishing attempt designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/uzX87CUNjRg/square?utm_term=mission+mangal+movie+download+in+tamil
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc3fbe55429721e1e299d/1626194939876/tilden_road_scituate_ma.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3f111d68f3225905f647a/1626599697763/mamanigemazim.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c1d997884458c9a0817f/1625801178078/auc_value_meaning.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edff79a4137771ba059763/1626210170215/tagexofinulogifivozeda.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f8abfe3dc1753e7ba2b36b/1626909694852/97382092845.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec83ea4027437375968a47/1626113002150/bible_verses_supporting_lgbtq.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9067dcc7c08645925d433/1625884285852/royalty_free_illustrations.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efd0ece4fb0f110d79a2b1/1626329324172/83620671259.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1ff4252a315316be20a1a/1626472258835/15178084465.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f8ab0ca4da41491ecb668a/1626909452422/68127331014.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee1cb84d490f67274f686a/1626217656415/concept_of_risk_based_auditing.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0cd0b9392da325e91ba35/1626393867438/whats_is_love_baby_dont_hurt_me.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93d5ec91b61347ea488f4/1625898335149/least_stressful_careers_that_pay_well.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f668a718f24d24f44c902e/1626761383296/causes_of_hypersomnia_in_adults.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f15d4e9014c44c52924bfc/1626430799220/24205402120.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f95c5cec70443d923f4057/1626954844333/how_to_defrost_puff_pastry.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f85eb3896b5e2273a79e6c/1626889907312/nekade.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f319151ad9bf1c32b148cb/1626544405699/japusufetenu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f3ead904a1d97017a16198/1626598105919/the_jobs_to_be_done_playbook.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_off0000e81c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 16792 bytes
font_01_sfnt_off0001002e.bin
bc155e7e2ca3a76e8521d023d638598d149f558136afa86a807c4185294d4cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 16544 bytes
font_02_sfnt_off00012b10.bin
b404d6d0235fea02a2bbd2c2d9d51c96deb36ecb6786c07770ceddbf5cd59a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B10 10636 bytes

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