Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4eac42586858d0b…

MALICIOUS

PDF

93.8 KB Created: 2021-07-19 07:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 984b2a2a4b8d67e83054572a59789592 SHA-1: 36a3783206114e2490bb2c8d510942dfb1555fd1 SHA-256: c4eac42586858d0b9ea677c344fdb19b5301bb7633f050b9f36efb6de3dda3ef
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains embedded URLs that lead to external websites, suggesting a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to spearphishing via attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/NsX9ihectO0/square?utm_term=brook+meaning+in+tamil
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efcf9b7fedc2490c0877eb/1626328987939/keith_haring_untitled_dance.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3c5057f94c710fbcab58a/1626588421174/call_of_duty_world_war_2_trophy_guide.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2fb91a8f65e35b6d521bd/1626536849416/dead_poets_society_full_movie_download_720p.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e82f7d8592fe3a58950828/1625829245831/gekaxom.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed89694bcdcf6393ff7ecc/1626179945493/understanding_motivation_and_emotion_6th_edition.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee38f6df3d323292d02989/1626224886476/workhouses_and_the_poor_law.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f4a4ce3a33e4096deae181/1626645710205/mikozazenedefexivasudo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f4e7829c57c249394e24c5/1626662786220/47826775633.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0288197dca740078fa339/1626351745454/3_months_vaccination_for_baby.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f4d36e7121636e99b2b231/1626657646134/podukupikuka.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f07ae1f608047cbdecf541/1626372834058/2454056221.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edd0039779423221de391b/1626198019835/sims_5_download_free_full_version.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013d6f.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13D6F 18328 bytes
font_00_sfnt_off0000d583.bin
ac3ae01526c048cda8ad8e590f9249a277c366756789cc35fdb3db66e377665a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD583 10428 bytes
font_01_sfnt_off0000ed24.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 16792 bytes
font_02_sfnt_off00010536.bin
ddfe764a5956406f80628f7a1fad71b15bce5d9f850e063d1b08948e1c89bac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10536 22704 bytes
font_04_sfnt_off00015b07.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B07 3464 bytes

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