Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ac85f536eab01a…

MALICIOUS

PDF

93.5 KB Created: 2021-07-18 20:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34906c76c968f299eeef602bd4afd78f SHA-1: 7490a1ea78d87ab218b230d1e9a38c813909e3b6 SHA-256: 39ac85f536eab01a41933ef36c569ea7e783aa9f7836d54187045f597cc00218
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 PDF contains embedded URLs, suggesting it is designed to redirect users to external sites, a common tactic for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a potential exploitation or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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/UZrB20b2Dcg/square?utm_term=pediatrician+job+interview+questions+and+answers
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f3475ccba7b71501e61366/1626556252809/four_pictures_and_a_word.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8fc23566ded7d61ab5d77/1625881635409/find_the_value_of_x_and_y_in_each_triangle.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f20cd0ec922002f42a07c3/1626475729048/meaning_of_muddled_in_english.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2ac21b84a576e6cf8e73d/1626516513396/84646085439.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec970958d864752e02bddb/1626117897471/70458119661.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2047f6d99b078444f686c/1626473600007/famabewuferake.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec80d5947cc46ca128500f/1626112213751/71648232374.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f11c21fcdff1298e550c03/1626414113570/irs_get_my_payment_second_stimulus.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8b5128868327fff7f07be/1625863442815/int_activity_in_epilepsy.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed8ad8094bb21e9996546e/1626180312711/risemofezi.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_off00010a3c.bin
f329488c431187eb50027ba6355ba5a29d02386dd07ffbd55fdaa6bcccb70a18
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3C 16888 bytes
font_01_sfnt_off0001360f.bin
7dd4bdc18cb52bbbdbe4bbf621c533ba8e19c8ee3e96857233b2a3a213150ad3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1360F 10984 bytes
font_02_sfnt_off00014f88.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F88 16792 bytes