Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa7a4efd85a5159c…

MALICIOUS

PDF

84.8 KB Created: 2021-07-14 08:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70011043f3905da7e81822a8f0c42dfb SHA-1: 6ebf89661f883fc5430ee5d505b465270edeff1d SHA-256: aa7a4efd85a5159c0588653d47fcd1eedd635f61cd3f441c7cd880237bf2559b
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ClamAV signature (Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0) and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI, although flagged as benign, suggests an attempt to redirect or link to malicious content. The document body is heavily obfuscated and unreadable, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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/sq/ugae/~3/jEScUJLm1bs/square?utm_term=tamil+new+movies+online+streaming+free
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8be32e534972f7b796aac/1625865779062/74300118271.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee6cfadf274736e0ae8aba/1626238202980/26807589648.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edcac5c450ee47307cad8a/1626196678015/action_words_acting.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8f084563c1506a8b3e0a1/1625878660220/not_by_might_nor_by_power_but_by_my_spirit_says_the_lord_almighty.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8fad28915684aa53b9c78/1625881298364/41737599439.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e85e71b34e3e37de33a1d8/1625841265656/annals_of_endocrinology_and_metabolism_impact_factor.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee0bfa84a0477e84a796c4/1626213370370/dodezexarireraf.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eca37c7b14134336dfaed5/1626121084459/general_science_and_technology_book.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee78a1fd66ff3739f1e62f/1626241185304/how_to_connect_laptop_to_pc_via_lan.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7aa7c8b0d544b6d6bca3/1626110631162/new_deal_federalism.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8b640641ef15ae16d5706/1625863744900/zifimudifidunamemo.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc6b2cc8e436e46630f60/1626195634731/71279258831.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_off0000eb7a.bin
0a4fe68f64efd0f328e59447a194ba19714ad5326c164cc4b0f24dfee3815ffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 10672 bytes
font_01_sfnt_off00010402.bin
1311209917a75b9215edb08f3f23f439bd40cec7eb38205ff515195051fbb4e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10402 16524 bytes
font_02_sfnt_off00012e92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E92 16792 bytes

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