Malicious PDF — malware analysis report

Static analysis result for SHA-256 0555548b59965ca5…

MALICIOUS

PDF

21.0 KB Created: 2019-05-02 07:49:20 +01:00 Authoring application: mPDF 5.7
MD5: bbadfe2341623e999bd0bcb60125e1d9 SHA-1: 2178ffc6deae050b56328edfe359bc8981225a8e SHA-256: 0555548b59965ca52fd60ddb6d6db6bb7e0041f867fb9551c530c6dc97782dcf
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which is indicative of a link farm or redirection tactic. While the URLs themselves are labeled as confirmed benign, the sheer volume and the heuristic firing suggest an attempt to direct users to potentially malicious content or to manipulate search engine results. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://xiixmcuin.linkpc.net/4207201206207206/Lunch-Wars-How-to-Start-a-School-Food-Revolution-and-Win-the-Battle-for-Our-Children-s-Health-by-Amy-Kalafa.pdf
    • http://xiixmcuin.linkpc.net/8206205202201206/No-Free-Lunch-Food-amp-Revolution-in-Cuba-Today-by-Medea-Benjamin.pdf
    • http://xiixmcuin.linkpc.net/1200206205209206207/School-Wars-The-Battle-for-Britain-s-Education-by-Melissa-Benn.pdf
    • http://xiixmcuin.linkpc.net/8208205209207204/Positive-Outcomes-in-Health-How-Food-Exercise-and-Your-Immune-System-Lead-to-Good-Health-by-Lee-Oberst.pdf
    • http://xiixmcuin.linkpc.net/1204201209201200/Food-Politics-How-the-Food-Industry-Influences-Nutrition-and-Health-by-Marion-Nestle.pdf
    • http://xiixmcuin.linkpc.net/1201208208208203202/Fresh-Start---SIMPLE-SOLUTIONS-FOR-WEIGHT-LOSS---LUNCH-IDEAS-by-Cory-Rocko.pdf
    • http://xiixmcuin.linkpc.net/1208209203202200/Free-for-All-Fixing-School-Food-in-America-California-Studies-in-Food-and-Culture-28-by-Janet-Poppendieck.pdf
    • http://xiixmcuin.linkpc.net/1203203205209208/Can-You-Get-An-F-In-Lunch-How-I-Survived-Middle-School-1-by-Nancy-E-Krulik.pdf
    • http://xiixmcuin.linkpc.net/4202209202206204/Start-Talking-A-Girl-s-Guide-for-You-and-Your-Mom-about-Health-Sex-or-Whatever-by-Mary-Jo-Rapini.pdf
    • http://xiixmcuin.linkpc.net/6206209208207201/Battles-Involving-Hanover-Battle-of-Waterloo-Battle-of-Dettingen-Battle-of-Fontenoy-Battle-of-Tourcoing-Battle-of-Melle-by-Source-Wikipedia.pdf
    • http://xiixmcuin.linkpc.net/1204207205200209/The-Boys-Start-the-War-Boy-Girl-Battle-1-by-Phyllis-Reynolds-Naylor.pdf
    • http://xiixmcuin.linkpc.net/8201202204203204/Food-and-Drink-Best-Health-Recipe-Book-by-Vesco-Inc.pdf
    • http://xiixmcuin.linkpc.net/8202202203208206/Right-from-the-Start-Behavioral-Intervention-for-Young-Children-with-Autism-by-Sandra-L-Harris.pdf
    • http://xiixmcuin.linkpc.net/2204201203200202/Food-Wars-Vol-1-by-Yuto-Tsukuda.pdf
    • http://xiixmcuin.linkpc.net/2201200209205200/Food-Wars-Vol-1-by-Yuto-Tsukuda.pdf
    • http://xiixmcuin.linkpc.net/1209200205209200/The-Taste-Of-War-World-War-Two-And-The-Battle-For-Food-by-Lizzie-Collingham.pdf
    • http://xiixmcuin.linkpc.net/6209204208209206/The-Battle-of-Riptide-Sharks-Wars-2-by-E-J-Altbacker.pdf
    • http://xiixmcuin.linkpc.net/3207201206206203/Fields-of-Battle-The-Wars-for-North-America-by-John-Keegan.pdf
    • http://xiixmcuin.linkpc.net/2200208200200204/Blood-Revolution-God-Wars-3-by-Connie-Suttle.pdf
    • http://xiixmcuin.linkpc.net/6207206208203203/On-Red-Soil-WARS-The-Battle-of-Phobos---Earthers-Part-2-of-3-by-Nathan-P-Butler.pdf