Malicious PDF — malware analysis report

Static analysis result for SHA-256 9838f60dade73ebb…

MALICIOUS

PDF

105.7 KB Created: 2021-07-22 15:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c52ec68e06135820e4216716262863d7 SHA-1: 6b848170b48e15af1296eb39ee8fff01dc16905d SHA-256: 9838f60dade73ebbfb95c368423e5d602f086eede24485b27e964ccde7ffdf34
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are marked as benign, suggests an attempt to lure users to external resources. The file's structure and detection by security tools point towards it being a malicious document, likely delivered via spearphishing, designed to exploit vulnerabilities or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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=excel+interpolate+between+two+points
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f76c393f21a400e1123dab/1626827833432/tetradynamous_condition_is_found_in.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f08a84829bd105fae8f0df/1626376836634/anatomy_and_physiology_12th_edition.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8af33f7a034ccb7b5dea/1626114803954/39122343224.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f3fe8bbf9212646c41246c/1626603147803/13928815475.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2b32cc5d9e6782cda1a35/1626518316348/non_chronological_report_examples_year_3.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f5a7650878dc2040c19ffa/1626711909630/advantages_of_controlled_rectifier_over_uncontrolled_rectifier.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8609544497c3ffe66dfd9/1625841813572/jozakatefugikalepuso.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca6aa1d0b393375546138/1626121898464/88535028112.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f27cac2e59700d3e554ec4/1626504364912/kamaduveweted.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f5bb6b7ec9095abb15eb55/1626717036109/which_way_to_epilate.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec789d7e2b6271615a4f7e/1626110110118/mabumiwinanidupupabug.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f05eb64381433ecec592e0/1626365622407/cocker_spaniel_puppy_eating_stones.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1790915846f0d14ee459e/1626437897810/how_to_write_logarithmic_equations_in_exponential_form.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee8a467c5bce1f335113e8/1626245702856/23064656585.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e862cbd939c806f71c744c/1625842379464/tommy_young_sheldon.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee198c9c71001bedf31fa4/1626216844349/fitukezegomuzozujilawo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92905b68d8f0f4bf8889e/1625893125148/download_ccleaner_for_windows_10_with_crack.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8fdc737cb9044755e79c4/1625882055686/valium_10mg_side_effects.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f576ec731d8c7c6f167f3b/1626699500089/41010184371.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee54a58685745b7d168142/1626231973659/polio_countries_2020.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f8ee4cd35d04529b2c59ad/1626926669034/9095934724.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee08511f51426150c91551/1626212433788/audit_quiz_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f4e0e91434f63547365708/1626661097999/computer_quiz_questions_and_answers.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_off00012db0.bin
9cb777d56bd0efa50553e9d8d850ba74a1b54271e2e858cef5f9cca42fbcb60f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB0 10676 bytes
font_01_sfnt_off0001461d.bin
0c77baea0d3cfd6eaafd2c15efc3d35aa6398f2d3a9948c1371474c7389b7948
pdf-font-stream PDF embedded font (sfnt) at offset 0x1461D 20584 bytes
font_02_sfnt_off00017df6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17DF6 16792 bytes