Malicious PDF — malware analysis report

Static analysis result for SHA-256 6493c1a6a2df064d…

MALICIOUS

PDF

80.5 KB Created: 2021-07-20 09:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d039d90c8804822abf7578ad084d6db2 SHA-1: 816a3e072edf00437ea13262540b8d0725d013a8 SHA-256: 6493c1a6a2df064da4dc9db6b4d6e5436c7e942ee364d4c721a3e8c2a0047100
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as a phishing trojan. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect users to malicious content. The file's structure and detection as a trojan indicate it likely exploits a vulnerability or employs social engineering to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/sq/ugae/~3/nCRFBnYrBHY/square?utm_term=what%27s+a+jacob%27s+ladder+piercing
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edf0d7d6548a387fd4ffc8/1626206424001/11680703532.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f080e904801d6486b390b6/1626374377835/area_under_the_curve_questions.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79b3d1873c46ac935b9ad/1625791293717/real_boxing_game_download.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f35d2380d83038fa830774/1626561827406/apa_chicago_style.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec9a08e7718717d763fb35/1626118664753/rodatifiwuposubir.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7fcced0799e4214c1b7ed/1625816270160/cost_sheet_format_in_excel.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edbef610369373fd808647/1626193654923/questions_and_answers_about_the_holy_spirit.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0d42fb348e55d1c4d015d/1626395695956/41525211445.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda71e3680ef421b559fe1/1626187551315/63616780002.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f5f54fc3aabd419c89a74c/1626731855353/tagejojipo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93c758ce0e10532d37f15/1625898101329/performance_appraisal_questions_and_answers_sample.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_off0000d757.bin
54dbc5123922339a1ba77123e0d4b8ac86693bd1e3c5a681655156e89e1b2057		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD757 17148 bytes
font_01_sfnt_off000103ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103FF 16792 bytes
font_02_sfnt_off00011c16.bin
1eefe69440f372a2ec809a931ecac33a607fc538241d89ddca2ccbcd1242365a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C16 11092 bytes

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