Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4df1d732ea6949d…

MALICIOUS

PDF

14.4 KB Created: 2019-05-07 04:44:17 +01:00 Authoring application: mPDF 5.7
MD5: c90ece6f4667bdeb7cc411a6a56c30e0 SHA-1: 239eb65d96fd5c60c4a25aeeaacbd79f9927e945 SHA-256: e4df1d732ea6949d95063ac84d558cec27c7e3fc7443985f6381f52df4b890f0
90 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a large number of embedded external links. The ML classifier also flagged this PDF as malicious. While the document body is unreadable, the presence of numerous links to external PDFs, many of which appear to be book titles, suggests a tactic to generate traffic or distribute 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://loaminoo.linkpc.net/2094094094099098/Protecting-the-Pregnant-Witness-The-Precinct-SWAT-3-The-Precinct-15-by-Julie-Miller.pdf
    • http://loaminoo.linkpc.net/2090092095091099/Man-with-the-Muscle-The-Precinct-SWAT-1-The-Precinct-13-by-Julie-Miller.pdf
    • http://loaminoo.linkpc.net/2091091098093091/Nine-Month-Protector-The-Precinct-Vice-Squad-2-The-Precinct-6-by-Julie-Miller.pdf
    • http://loaminoo.linkpc.net/3095096094095097/The-Con-Man-87th-Precinct-4-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/8090097093094/Lullaby-87th-Precinct-41-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/4093092090095097/Lightning-87th-Precinct-37-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/4099096092097092/The-Heckler-87th-Precinct-12-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/8094090093094098/Jigsaw-87th-Precinct-24-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/1094093098092095/Hark-87th-Precinct-54-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/3094094093097093/The-Big-Bad-City-87th-Precinct-49-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/2096096091092093/Poison-87th-Precinct-39-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/5090094099092094/Killer-s-Payoff-87th-Precinct-6-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/8092095097094/Long-Time-No-See-87th-Precinct-32-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/3096092096092096/Hail-Hail-the-Gang-s-All-Here-87th-Precinct-25-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/3095094091094094/Lady-Lady-I-Did-It-87th-Precinct-14-by-Ed-McBain.pdf
    • http://loaminoo.linkpc.net/2094098099094099/Protecting-His-Witness-Red-Stone-Security-7-by-Katie-Reus.pdf
    • http://loaminoo.linkpc.net/2099098094090098/BABY-TALK-THE-SECRET-DIARY-OF-A-PREGNANT-WOMAN-by-Julie-Walters.pdf
    • http://loaminoo.linkpc.net/4093093093094095/Stepbrother-Got-Me-Pregnant-Forbidden-Pregnant-1-by-Ethan-Cox.pdf
    • http://loaminoo.linkpc.net/4097090095097098/Something-Is-Out-There-by-Julie-Miller.pdf
    • http://loaminoo.linkpc.net/1091097099095095095/Babawagter-911-by-Julie-Miller.pdf
    • http://loaminoo.linkpc.net/8092095097094/Long-Time-No-See-87th-P

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