Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a497951f8520ef3…

MALICIOUS

PDF

14.3 KB Created: 2019-11-09 23:13:33 +00:00 Authoring application: mPDF 5.7
MD5: a445ef42c79cd0ba5095e092f12c6829 SHA-1: 04bf0215862ff4a314c6d422fd357826f0ef6a2c SHA-256: 4a497951f8520ef3b11ee054e6df46ad97d3298f0bbae4321167beae9f30b68b
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, identified as a link farm. The primary heuristic indicates this is a critical finding, suggesting the document's purpose is to direct users to numerous external sites. While the specific intent of these external sites is not definitively malicious based on the provided labels, the sheer volume and the heuristic's classification strongly suggest a malicious or manipulative purpose, such as SEO spam or hosting further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://cefasfese
    • http://cefasfese.4pu.com/1733736731731733/Unmarked-Treasure-Poems-by-Cyril-Wong.pdf
    • http://cefasfese.4pu.com/6737734737734731/Below-Absence-Poems-by-Cyril-Wong.pdf
    • http://cefasfese.4pu.com/1731733738736736738/Russel-Wong-Photographs-1980-2005-by-Russel-Wong.pdf
    • http://cefasfese.4pu.com/3738732733738/Unmarked-The-Legion-2-by-Kami-Garcia.pdf
    • http://cefasfese.4pu.com/4733738731737/Murder-Most-Unladylike-A-Wells-amp-Wong-Mystery-Wells-amp-Wong-Mystery-1-by-Robin-Stevens.pdf
    • http://cefasfese.4pu.com/4739731737732737/An-Unmarked-Grave-Bess-Crawford-4-by-Charles-Todd.pdf
    • http://cefasfese.4pu.com/5734739733730/Unmarked-Sean-s-Story-Chosen-4-by-Alisa-Mullen.pdf
    • http://cefasfese.4pu.com/2738733731735735/Egyptian-Art-by-Cyril-Aldred.pdf
    • http://cefasfese.4pu.com/6733736735739/Three-Shadows-by-Cyril-Pedrosa.pdf
    • http://cefasfese.4pu.com/5739737731731732/The-Egyptians-by-Cyril-Aldred.pdf
    • http://cefasfese.4pu.com/2738738736735733/Enemies-of-Promise-by-Cyril-Connolly.pdf
    • http://cefasfese.4pu.com/5739737732730735/Suicide-Excepted-by-Cyril-Hare.pdf
    • http://cefasfese.4pu.com/5739737730738730/Cyril-Ramaphosa-by-Anthony-Butler.pdf
    • http://cefasfese.4pu.com/1738737736739735/Some-Never-Forget-A-POW-MIA-Truth-Novel-by-R-Cyril-West.pdf
    • http://cefasfese.4pu.com/7737730730738731/Studies-on-Constantinople-by-Cyril-Mango.pdf
    • http://cefasfese.4pu.com/8739733736736/Death-is-No-Sportsman-by-Cyril-Hare.pdf
    • http://cefasfese.4pu.com/5739737732739738/Quinn-s-Socks-by-Melita-Cyril.pdf
    • http://cefasfese.4pu.com/5739737730735731/An-English-Murder-by-Cyril-Hare.pdf
    • http://cefasfese.4pu.com/8735730733733734/Lytton-Strachey-by-Cyril-Clemens.pdf
    • http://cefasfese.4pu.com/9734739732738739/The-Called-Him-Traitor-by-Cyril-J-Davey.pdf

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